diff --git a/examples/csmsc/vits/local/synthesize_e2e.sh b/examples/csmsc/vits/local/synthesize_e2e.sh
index 3f3bf6517..7430f52aa 100755
--- a/examples/csmsc/vits/local/synthesize_e2e.sh
+++ b/examples/csmsc/vits/local/synthesize_e2e.sh
@@ -18,5 +18,6 @@ if [ ${stage} -le 0 ] && [ ${stop_stage} -ge 0 ]; then
         --phones_dict=dump/phone_id_map.txt \
         --output_dir=${train_output_path}/test_e2e \
         --text=${BIN_DIR}/../sentences.txt \
-        --add-blank=${add_blank}
+        --add-blank=${add_blank} #\
+        # --inference_dir=${train_output_path}/inference
 fi
diff --git a/examples/csmsc/vits/run.sh b/examples/csmsc/vits/run.sh
index 74505d9b9..7a928c998 100755
--- a/examples/csmsc/vits/run.sh
+++ b/examples/csmsc/vits/run.sh
@@ -9,7 +9,7 @@ stop_stage=100
 
 conf_path=conf/default.yaml
 train_output_path=exp/default
-ckpt_name=snapshot_iter_153.pdz
+ckpt_name=snapshot_iter_333000.pdz
 add_blank=true
 
 # with the following command, you can choose the stage range you want to run
diff --git a/paddlespeech/t2s/exps/syn_utils.py b/paddlespeech/t2s/exps/syn_utils.py
index 491edda30..07ff1cc72 100644
--- a/paddlespeech/t2s/exps/syn_utils.py
+++ b/paddlespeech/t2s/exps/syn_utils.py
@@ -445,9 +445,11 @@ def am_to_static(am_inference,
     elif am_name == 'tacotron2':
         am_inference = jit.to_static(
             am_inference, input_spec=[InputSpec([-1], dtype=paddle.int64)])
-
-    paddle.jit.save(am_inference, os.path.join(inference_dir, am))
-    am_inference = paddle.jit.load(os.path.join(inference_dir, am))
+    elif am_name == 'vits':
+        am_inference = jit.to_static(
+            am_inference, input_spec=[InputSpec([-1], dtype=paddle.int64)])
+    jit.save(am_inference, os.path.join(inference_dir, am))
+    am_inference = jit.load(os.path.join(inference_dir, am))
     return am_inference
 
 
@@ -458,8 +460,8 @@ def voc_to_static(voc_inference,
         voc_inference, input_spec=[
             InputSpec([-1, 80], dtype=paddle.float32),
         ])
-    paddle.jit.save(voc_inference, os.path.join(inference_dir, voc))
-    voc_inference = paddle.jit.load(os.path.join(inference_dir, voc))
+    jit.save(voc_inference, os.path.join(inference_dir, voc))
+    voc_inference = jit.load(os.path.join(inference_dir, voc))
     return voc_inference
 
 
diff --git a/paddlespeech/t2s/exps/vits/synthesize_e2e.py b/paddlespeech/t2s/exps/vits/synthesize_e2e.py
index f9d10ea62..f9c8b3f71 100644
--- a/paddlespeech/t2s/exps/vits/synthesize_e2e.py
+++ b/paddlespeech/t2s/exps/vits/synthesize_e2e.py
@@ -20,14 +20,15 @@ import yaml
 from timer import timer
 from yacs.config import CfgNode
 
+from paddlespeech.t2s.exps.syn_utils import am_to_static
 from paddlespeech.t2s.exps.syn_utils import get_frontend
 from paddlespeech.t2s.exps.syn_utils import get_sentences
 from paddlespeech.t2s.models.vits import VITS
+from paddlespeech.t2s.models.vits import VITSInference
 from paddlespeech.t2s.utils import str2bool
 
 
 def evaluate(args):
-
     # Init body.
     with open(args.config) as f:
         config = CfgNode(yaml.safe_load(f))
@@ -63,7 +64,22 @@ def evaluate(args):
     vits = VITS(idim=vocab_size, odim=odim, **config["model"])
     vits.set_state_dict(paddle.load(args.ckpt)["main_params"])
     vits.eval()
-
+    VITSInference
+
+    vits_inference = VITSInference(vits)
+    # whether dygraph to static
+    if args.inference_dir:
+        # acoustic model
+        # vits = jit.to_static(
+        #         vits, input_spec=[InputSpec([-1], dtype=paddle.int64)])
+        # jit.save(vits, os.path.join(inference_dir, args.am))
+        # vits = jit.load(os.path.join(inference_dir, args.am))
+        vits_inference = am_to_static(
+            am_inference=vits_inference,
+            am=args.am,
+            inference_dir=args.inference_dir,
+            speaker_dict=args.speaker_dict)
+     
     output_dir = Path(args.output_dir)
     output_dir.mkdir(parents=True, exist_ok=True)
     merge_sentences = False
@@ -92,8 +108,7 @@ def evaluate(args):
                     spk_id = None
                     if spk_num is not None:
                         spk_id = paddle.to_tensor(args.spk_id)
-                    out = vits.inference(text=part_phone_ids, sids=spk_id)
-                    wav = out["wav"]
+                    wav = vits_inference(text=part_phone_ids, sids=spk_id)
                     if flags == 0:
                         wav_all = wav
                         flags = 1
@@ -155,6 +170,11 @@ def parse_args():
         type=str2bool,
         default=True,
         help="whether to add blank between phones")
+    parser.add_argument(
+        '--am',
+        type=str,
+        default='vits_csmsc',
+        help='Choose acoustic model type of tts task.')
 
     args = parser.parse_args()
     return args
diff --git a/paddlespeech/t2s/models/vits/transform.py b/paddlespeech/t2s/models/vits/transform.py
index fec80377c..8c6227a6a 100644
--- a/paddlespeech/t2s/models/vits/transform.py
+++ b/paddlespeech/t2s/models/vits/transform.py
@@ -35,9 +35,10 @@ def piecewise_rational_quadratic_transform(
         inverse=False,
         tails=None,
         tail_bound=1.0,
-        min_bin_width=DEFAULT_MIN_BIN_WIDTH,
-        min_bin_height=DEFAULT_MIN_BIN_HEIGHT,
-        min_derivative=DEFAULT_MIN_DERIVATIVE, ):
+        # for dygraph-to-static
+        min_bin_width=1e-3,
+        min_bin_height=1e-3,
+        min_derivative=1e-3, ):
     if tails is None:
         spline_fn = rational_quadratic_spline
         spline_kwargs = {}
@@ -74,9 +75,10 @@ def unconstrained_rational_quadratic_spline(
         inverse=False,
         tails="linear",
         tail_bound=1.0,
-        min_bin_width=DEFAULT_MIN_BIN_WIDTH,
-        min_bin_height=DEFAULT_MIN_BIN_HEIGHT,
-        min_derivative=DEFAULT_MIN_DERIVATIVE, ):
+        # for dygraph-to-static
+        min_bin_width=1e-3,
+        min_bin_height=1e-3,
+        min_derivative=1e-3, ):
     inside_interval_mask = (inputs >= -tail_bound) & (inputs <= tail_bound)
     outside_interval_mask = ~inside_interval_mask
 
@@ -89,8 +91,12 @@ def unconstrained_rational_quadratic_spline(
         constant = np.log(np.exp(1 - min_derivative) - 1)
         unnormalized_derivatives[..., 0] = constant
         unnormalized_derivatives[..., -1] = constant
-
-        outputs[outside_interval_mask] = inputs[outside_interval_mask]
+        # import pdb
+        # pdb.set_trace()
+        # print("inputs:",inputs)
+        # print("outside_interval_mask:",outside_interval_mask)
+        a = inputs[outside_interval_mask]
+        outputs[outside_interval_mask] = a
         logabsdet[outside_interval_mask] = 0
     else:
         raise RuntimeError("{} tails are not implemented.".format(tails))
@@ -130,9 +136,10 @@ def rational_quadratic_spline(
         right=1.0,
         bottom=0.0,
         top=1.0,
-        min_bin_width=DEFAULT_MIN_BIN_WIDTH,
-        min_bin_height=DEFAULT_MIN_BIN_HEIGHT,
-        min_derivative=DEFAULT_MIN_DERIVATIVE, ):
+        # for dygraph-to-static
+        min_bin_width=1e-3,
+        min_bin_height=1e-3,
+        min_derivative=1e-3, ):
     if paddle.min(inputs) < left or paddle.max(inputs) > right:
         raise ValueError("Input to a transform is not within its domain")
 
diff --git a/paddlespeech/t2s/models/vits/vits.py b/paddlespeech/t2s/models/vits/vits.py
index e68ed5643..7013e06c0 100644
--- a/paddlespeech/t2s/models/vits/vits.py
+++ b/paddlespeech/t2s/models/vits/vits.py
@@ -532,3 +532,14 @@ class VITS(nn.Layer):
                         module.weight[module._padding_idx] = 0
 
         self.apply(_reset_parameters)
+
+class VITSInference(nn.Layer):
+    def __init__(self, model):
+        super().__init__()
+        self.acoustic_model = model
+
+    def forward(self, text, sids=None):
+        out = self.acoustic_model.inference(
+            text, sids=sids)
+        wav = out['wav']
+        return wav