Electrical embedded box for building

The utility model discloses an electrical pre-embedded box for a building. The electrical pre-embedded box comprises a pre-embedded box body; the embedded box body is composed of an upper box body anda lower box body. Lifting plates are arranged at the bottoms of the vertical ends of the two sides of the upper box body; reserved grooves are formed in the tops of the vertical ends of the two sidesof the lower box body, the upper box body and the lower box body are connected through corresponding embedded clamping connection of lifting plates and the reserved grooves, threading holes are formed in the horizontal end of the upper box body at equal intervals, winding rods are arranged on the inner wall of the horizontal end of the upper box body at equal intervals, and anti-disengagement plates are arranged at the bottoms of the winding rods. According to the utility model, according to the electrical embedded box for the building, the split type structural design is adopted, the electrical embedded box can be co