The invention relates to a submersible electric pump convenient to machine and assembly and high in assembly efficiency, and belongs to submersible electric pumps. The submersible electric pump includes a fastening bolt, a base, open retaining rings, bearing blocks, bearings, skeleton seals, a stator coil, rotor assemblies, a water inlet section, a rotor shaft, a water pump body, a casing and a water discharge bolt; the upper end of the casing is connected with the water pump body; the upper end and the lower end in the casing are connected with the open retaining rings; the open retaining ring at the lower end is connected with the base and the corresponding bearing block, the open retaining ring at the upper end is connected with the corresponding bearing seat and the water inlet section, and the stator coil is connected with the position, between the upper open retaining ring and the lower open retaining ring, in the casing; the bearings and the skeleton seals are connected to the upper and lower bearing blocks, and the rotor assemblies are connected to the two bearings; and the water discharge bolt is connected to the base. The submersible electric pump has the advantages thatit is ensured that the upper and lower bearing blocks are universal, the assembly precision requirements of the submersible electric pump are met, a water pump shaft and the rotor shaft are automatically locked and fixed, the labor intensity is reduced, the production efficiency is improved, the efficiency is high, and the assembly effect is good.