The invention provides a grippe. The gripper comprises a body, an upper side gripper assembly, a left side gripper assembly and a right side gripper assembly. The upper side gripper assembly comprises an upper side body, an upper side pivoting connection arm, an upper side telescopic connection rod, an upper side X-direction bearing spring body and an upper side X-direction side force bearing spring body. The left side gripper assembly comprises a left side body, a left side pivoting connection arm, a left side telescopic connection rod, a left side X-direction bearing spring body, a left side Z-direction bearing spring body, a left side X-direction side force bearing spring body, a left side Y-direction side force bearing spring body and a left side Z-direction side force bearing spring body. The right side gripper assembly comprises a right side body, a right side telescopic connection rod, a right side X-direction bearing spring body, a right side Z-direction bearing spring body, a right side X-direction side force bearing spring body, a right side Y-direction side force bearing spring body and a right side Z-direction side force bearing spring body. Thus, assembly force applied to a workpiece in the assembly process can be passively and flexibly monitored.