Velocity and displacement mixed locker and velocity and displacement mixed locking method

The invention discloses a velocity and displacement mixed locker and a velocity and displacement mixed locking method. The velocity and displacement mixed locker is a bilaterally symmetric structure and comprises a fixed body, a sliding body, a one-way damper, a locking block and a safety pin; one end of the one-way damper is connected with the sliding body through a piston rod; the locking block is arranged on the fixed body; the locking block is connected with the fixed body through the safety pin; and a cylinder body is mounted on the locking block. When the sliding body and the fixed body slide relative to each other at a velocity lower than a preset value, the safety pin is not cut off and the locking block does not execute locking; and when the sliding body and the fixed body slide relative to each other at a velocity larger than the preset value, the safety pin is cut off and the locking block executes locking so as to provide a locking force larger than a damping force; therefore, a purpose of velocit