The invention discloses a safety protection device for an ocean platform. The safety protection device comprises the ocean platform, and further comprises a fixed protective guard, a movable protective guard, a motor, a speed change box body, a worm, a worm wheel, a wire winding wheel, a hanging ring and a pull rope. The safety protection device for the ocean platform is simple in structure and strong in function, and can substitute for a worker to open and close the movable protective guard, so that the workload of the worker is alleviated; meanwhile, accidental drowning of the worker in an early operation process is avoided; furthermore, the device adopts worm wheel and worm transmission which has self-locking property, so that the movable protective guard is not needed to the locked manually when closed, and the safety is further improved.