The invention provides an absorbable vessel ligature clamp for a surgical operation and a method for preparing the absorbable vessel ligature clamp. The vessel ligature clamp is formed by the fusing and injection molding of a raw material which contains a biodegradable aliphatic polyester material by using a specifically-shaped mold. The vessel ligature clamp has a single-layer structure and is V-shaped. The ligature clamp is high in biocompatibility. Degradation time is controllable and can be matched with a vessel healing period after operation.