diff --git a/snowflake_generator.py b/snowflake_generator.py
new file mode 100644
index 0000000..2861677
--- /dev/null
+++ b/snowflake_generator.py
@@ -0,0 +1,66 @@
+import time
+import threading
+EPOCH_JAVA_COMMON = 1288834974657
+class Snowflake:
+    def __init__(self, datacenter_id: int = 0, worker_id: int = 0, epoch: int = 1480166465631):
+        # 机器和数据中心配置
+        self.worker_id_bits = 5
+        self.datacenter_id_bits = 5
+        self.sequence_bits = 12
+
+        self.max_worker_id = -1 ^ (-1 << self.worker_id_bits)
+        self.max_datacenter_id = -1 ^ (-1 << self.datacenter_id_bits)
+
+        if worker_id > self.max_worker_id or worker_id < 0:
+            raise ValueError(f"worker_id 超出范围 (0 ~ {self.max_worker_id})")
+        if datacenter_id > self.max_datacenter_id or datacenter_id < 0:
+            raise ValueError(f"datacenter_id 超出范围 (0 ~ {self.max_datacenter_id})")
+
+        self.worker_id = worker_id
+        self.datacenter_id = datacenter_id
+        self.epoch = epoch
+
+        self.sequence = 0
+        self.last_timestamp = -1
+
+        self.worker_id_shift = self.sequence_bits
+        self.datacenter_id_shift = self.sequence_bits + self.worker_id_bits
+        self.timestamp_left_shift = self.sequence_bits + self.worker_id_bits + self.datacenter_id_bits
+        self.sequence_mask = -1 ^ (-1 << self.sequence_bits)
+
+        self.lock = threading.Lock()
+
+    def _timestamp(self):
+        return int(time.time() * 1000)
+
+    def _til_next_millis(self, last_timestamp):
+        timestamp = self._timestamp()
+        while timestamp <= last_timestamp:
+            timestamp = self._timestamp()
+        return timestamp
+
+    def next_id(self) -> int:
+        with self.lock:
+            timestamp = self._timestamp()
+            if timestamp < self.last_timestamp:
+                raise Exception("时钟回拨，拒绝生成ID")
+
+            if timestamp == self.last_timestamp:
+                self.sequence = (self.sequence + 1) & self.sequence_mask
+                if self.sequence == 0:
+                    timestamp = self._til_next_millis(self.last_timestamp)
+            else:
+                self.sequence = 0
+
+            self.last_timestamp = timestamp
+
+            return ((timestamp - self.epoch) << self.timestamp_left_shift) | \
+                   (self.datacenter_id << self.datacenter_id_shift) | \
+                   (self.worker_id << self.worker_id_shift) | \
+                   self.sequence
+
+
+if __name__ == "__main__":
+    snowflake = Snowflake(datacenter_id=0, worker_id=0, epoch=EPOCH_JAVA_COMMON)
+    for _ in range(10):
+        print(str(snowflake.next_id()))