Heat dissipation module

A heat dissipation module comprises a mounting seat and a heat dissipation unit. The mounting base comprises a bottom wall and a plurality of side walls perpendicularly connected with the bottom wall, and the side walls jointly form a track space extending in the front-back direction. The heat dissipation units can slide in the corresponding track spaces in the front-back direction. The heat dissipation unit comprises a radiator and a lock. The radiator is provided with a body and a plurality of fins extending from the body, and a containing groove recessed from the front end is formed. The lock is provided with a base connected with the radiator and matched with the containing groove, and a lock cylinder set arranged on the base. The lock cylinder set is switched between a locking state and an unlocking state under the action of a key, the lock cylinder set is relatively fixed to the machine shell in the locking state so that the heat dissipation unit can not be taken out of the machine shell, and when the l