The utility model discloses a power supply's power switch control structure, its structure includes the mounting groove, an upper cover, the contact pin, the slot, the mounting panel, first mounting hole, the switch, flush mounting plate of switch, a main bod, the second mounting hole, mounting groove and as an organic wholeization of upper cover structure, the contact pin embedding is installed on the slot internal surface, first mounting hole and second mounting hole are on the coplanar, the switch embedding is installed in flush mounting plate of switch on the surface, it makes the cam to pushing down the clamp plate to press the switch, first rack will move down, make the second rack to remove left through the diversion wheel, insert the inserted block lower extreme that meets magnetron, make overload protective device be linked together with connecing the electricity end, if the electric current temperature load of inserted block is too high, the fuse will split, make the rack lose the constraint, cam spring will stimulate the cam and move to right with the rack, make under its lug that drops, meet with thunderbolt or working load when great, with the auto -power -off, safetyhazards are reduced.