The invention discloses a bionic clamp. The bionic clamp comprises a spanner body. A fixed claw is arranged on the top of the front end of the spanner body. The part, corresponding to the lower portion of the fixed claw, of the front end of the spanner body is sleeved with a movable mouth, and a movable claw is formed. The bionic clamp is novel in structure, and replacing existing vise grip pliers and pincer pliers is the purpose. According to the self-tightening-force principle, sliding blocks are arranged on the fixed claw and the movable claw, horizontal pull force can be converted into vertical clamping force through the two sliding blocks, and the function of grabbing of a clamped object is achieved. The clamping force can be automatically adjusted according to the outward pulling strength of the clamped object, optimal clamping force is achieved, a lock key with the locking state capable of being controlled by a rotary button is arranged at the tail end of one sliding block, the lock key has the function of fixing the sliding block state when the clamped object reaches the optimal clamping state, clamping is firmer, the sliding blocks are further provided with blades, and the lock key is controlled to drive the sliding blocks to move forwards so that the function of iron wire shearing can be achieved. Meanwhile, the bionic clamp is simple in structure, the production technology is simplified, and the bionic clamp is suitable for batched production.