The invention discloses a synchronous linkage semiautomatic ring plate cutting machine. The synchronous linkage semiautomatic ring plate cutting machine comprises a frame system, a cutting torch system, a synchronous linkage device and a centre assembly. The frame system and the cutting torch system are connected through the synchronous linkage device. The cutting torch system is divided into a large circle cutting torch system body and a small circle cutting torch system body. Adjusting devices are arranged in the frame system, the synchronous linkage device and the cutting torch system. The centre assembly is fixed to the bottom end of the synchronous linkage device. By means of the synchronous linkage device, the large circle cutting torch system body and the small circle cutting torch system body synchronously move. According to the synchronous linkage semiautomatic ring plate cutting machine, the requirement for cutting circular holes can be met, meanwhile, the requirement for cutting ring plates can be met, the purpose of cutting the ring plates in place through one step can be achieved, and the application range is wide.