The invention proposes a safety protection device of transformer shell lifting. The safety protection device comprises a bottom fixed device, a support rod and a detection unit, wherein the support rod is fixedly connected with the bottom fixed device, the detection unit is arranged at the top of the support rod and comprises a controller, a buzzer alarm, a light alarm and a displacement sensor, the buzzer alarm, the light alarm and the displacement sensor are electrically connected, and a power supply is arranged in the support rod and is used for supplying power to the detection unit. By thelifting safety protection device, a person is helped to more intuitively understand the amplitude of the transformer cover lifting process; and by the safety protection device, excessively large amplitude can be warned, meanwhile, the safety protection device has certain toughness, and the swinging amplitude can be helped to be reduced.