The invention discloses a detachable closed-frame-type integral impact seat. The detachable closed-frame-type integral impact seat comprises a frame-type integral impact seat, a wearing plate is arranged on the inner side of the impact seat, the wearing plate comprises a bearing surface wearing plate detachably arranged on the bottom surface of the inner side of the impact seat and two rear wearing plates detachably arranged on the inner side surface and the rear end surface of the impact seat, and the bearing surface wearing plate is a plane structure wearing plate made of nylon with a frontlocking fastener and a rear locking fastener; and the two wearing plates are correspondingly fixed to the inner side surface and the rear end surface of the impact seat though coupling bolts. According to the detachable closed-frame-type integral impact seat, the quick assembly of the impact seat, the vertical support of a car coupler and the transmission of longitudinal force can be satisfied, and the car coupler height can be adjusted; the car coupler supporting surface of the impact seat is provided with the wearing plate containing the nylon with the detachable structure, the impact seat rear wearing plate is provided with a bolt hole and connected with an impact seat body through bolts, the structure is simple, replacement is convenient, the impact seat body can be avoided being damaged, meanwhile the maintenance time of a vehicle can be reduced, and the maintenance cost of the vehicle can be lowered.