Split type mouse easy to disassemble and replace

The utility model discloses a split type mouse easy to disassemble and replace. The split type mouse comprises a mouse seat, a left button module, a right button module and a roller module, wherein an optical sensor, an optical lens, a light emitting diode, a universal serial bus (USB) interface and a control chip are integrated in the mouse seat; light-touch buttons and connecting ports are arranged in the left button module and the right button module; the connecting ports are arranged at the bottoms of the left button module and the right button module; bulges for fixedly connecting the left button module, the right button module and the roller module are arranged on the mouse seat; the bottoms of the left button module, the right button module and the roller module are provided with grooves which are matched with the bulges; and the left button module, the right button module and the roller module are fixed on the mouse seat through the bulges and the grooves though a matched mode. According to the split type mouse, a mouse left button, a mouse right button and a mouse roller can serve as three detachable functional modules, and can be replaced by the same modules when damaged, so that the waste of money for replacing the mouse can be avoided, and the split type mouse is applied to a user who replaces the mouse frequently.