The utility model discloses a field detection device of single-phase electric energy meters, and aims to provide a field detection device that is designed by an integrated structure, small in size, light in weight, convenient to carry, simple in operation and high in working efficiency, electric energy meters to be detected are only required to be hung on a meter hanging rack of the detection device without any other connection for field use, and errors are avoided. The field detection device comprises a housing, a measuring/control module, an unidirectional power source module and a meter hanging rack; the meter hanging rack is provided with three stations for electric energy meters to be detected and leads specially used for connecting the electric energy meters to be detected, and the stations and the leads are used for bearing the electric energy meters to be detected and electrical connection between the electric energy meters to be detected and a measuring control circuit; and the measuring/control module and the unidirectional power source module are both connected with the meter hanging rack and electrically connected with the electric energy meters to be detected via the meter hanging rack. The field detection device of the single-phase electric energy meters can be applied to the detection field of electric energy meters in the power system.