The present invention provides a plug converter which comprises a housing, a support assembly, a circuit board and at least two pin assemblies wherein the pin assemblies are arranged layer by layer in sequence, and the support assembly comprises a first support frame used for installing a live-wire connecting sheet and a null-wire connecting sheet and a second support frame used for installing the pin assemblies; the first support frame and the circuit board are arranged at the top and the bottom of the second support frame respectively.