The utility model relates to the field of nuclear power station construction, in particular to a safety protection device for a magnetic electric drill which is often used in installation and construction of a power station and a nuclear island, and aims at solving the problem that safety performance of a magnetic electric drill used in the prior art is low. The safety protection device for the magnetic electric drill comprises a U-shaped fastening structure, a clamping piece structure and a locking structure. Two side edge connecting rods of the U-shaped fastening structure are provided with outer threads. Two ends of the clamping piece structure are provided with two connecting through holes used for installation of the two side edge connecting rods. The locking mechanism comprises sleeve rings provided with inner threads matched with the outer threads on the side edge connecting rods. When the safety protection device for the magnetic electric drill is used, free ends of the side edge connecting rods of the U-shaped structure pass through the connecting through holes to form a rectangular framework structure, and the sleeve rings are sleeved on the free ends of the side edge connecting rods through the outside of the rectangular framework structure to lock the rectangular framework structure. By adoption of the safety protection device for the magnetic electric drill, construction safety is improved.