The invention discloses a device and method for quickly disassembling and assembling a CPU heat sink, belonging to the technical field of heat sink installation. The device for quickly disassembling and assembling the CPU radiator of the present invention includes a gear module, a screwdriver head A, a screwdriver head B, a slide rail A and a slide rail B, the gear module is composed of a gear A, a gear B and a gear C, and the gear A And gear B is arranged on slide rail A, and slides with slide rail A, and gear C is arranged on slide rail B, slides with slide rail B, and gear A, gear B mesh with gear C respectively, and the screwdriver head A Connect with gear A, screwdriver bit B connect with gear B. The device for quickly disassembling and assembling the CPU heat sink of the invention has a simple and reasonable structural design, is convenient to operate and use, can ensure the safety of the CPU or the CPU card slot, and can improve efficiency, and has good popularization and application value.