The invention discloses a charging method applied to a multi-interface charging conversion device. The multi-interface charging conversion device comprises a charging interface; a power distribution module which is connected to the charging interface; a plurality of charging sockets connected to the power distribution module; and a control module which is connected to the charging interface, the power distribution module, the charging socket and a human-computer interaction unit. According to the method, the power data of the charging interfaces and the charging sockets are collected through the control module, and the power distribution module is controlled to distribute power to the multiple charging sockets according to the indication of priority setting. According to the invention, power distribution for charging the electric vehicle under different situations is realized, and energy conservation and environmental protection are realized.