The invention relates to a power supply plug capable of being used in a superposed manner. The power supply plug comprises a housing, a housing cover fixed on the housing through screws, and a plurality of insertion sheets penetrating through the housing. One end, arranged in the housing, of each insertion sheet is connected with a power supply wire, and the tail part of each insertion sheet is provided with two elastic sheets which are attached to each other. The housing is further internally provided with a fixing plate used for fixing the plurality of insertion sheets. The housing cover is provided with jacks corresponding to the three insertion sheets. According to the invention, the power supply plug is provided with the jacks and can further supply power to other electrical appliances, so that sockets are saved.