The invention relates to protective equipment, in particularly to a protective door including a door body frame, rebar cages located in the door body frame, and a concrete layer poured and formed in the door body frame; the rebar cages include multiple horizontal rebars alternately arranged and multiple vertical rebars alternately arranged, wherein cross points of the horizontal rebars and the vertical rebars are fixed with welding; the number of rebar cages is at least two in the thickness direction of the door body frame and adapting pieces are arranged between the two rebar cages, wherein the adapting pieces are arranged in the thickness direction of the door body frame; a first bending section and a second bending section are formed by both ends of the adapting piece, the first bendingsection and the second bending section are correspondingly connected with the two rebar cages in a drawing mode and the rebar cages and the adapting pieces are fixed with welding; and each cross point of the horizontal rebar and the vertical rebar corresponds to an adapting piece. The Multiple of rebar cages are forced together, namely the force bearing thicknesses of the rebar cages are the together thicknesses of the multiple of rebar cages in the action of the adapting pieces; and then when the concrete layer is poured, the rebar cages are not prone to being bent and out of shape due to the buoyancy of the concrete.