The invention discloses a circuit board dismounting structure, comprising a mounting plate, a circuit board body is arranged on the top of the mounting plate, a first support column is fixedly connected to the left side of the bottom of the circuit board body, and the first support column The bottom of the mounting plate penetrates to the inside of the mounting plate, and the bottom of the left side of the mounting plate is penetrated with a movable column, and the left side of the movable column is fixedly connected with a turntable. The present invention is provided with a mounting plate, a circuit board body, a first support column, a movable column, a turntable, a handle, a limit plate, a screw, a baffle, a screw block, a bracket, a clamping rod, a movable groove, a second support column, and a clamping block. The use of the card slot solves the problem that the existing circuit boards are connected by screws during installation. After a long period of use, the screws are prone to damage, which makes it difficult to disassemble the circuit board. The circuit board disassembly structure , has the advantage of being easy to disassemble, which is convenient for users to use.