The invention provides a control method of a connection converter for a low-voltage AC/DC hybrid power distribution system. The method is characterized by judging a target operation mode of the low-voltage AC/DC hybrid power distribution system; if the target operation mode is a grid-connected operation mode, judging DC bus voltage change value under the grid-connected operation mode according to a grid-connected control target, and controlling the connection converter to carry out control operation; and if the target operation mode is an isolated island operation mode, judging overload and light load states of a low-voltage AC side and a low-voltage DC side under the isolated island operation mode according to an isolated island control target, and controlling the connection converter to carry out control operation. The method is simple, reliable and effective; on the basis of detailed analysis of the grid-connected operation mode and the isolated island operation mode of the hybrid power distribution system, corresponding connection converter control methods are provided for the two operation modes respectively, thereby avoiding complex control structure switching; and besides, operation loss is reduced, and the method is easy for engineering realization, and thus normal operation of the current low-voltage AC/DC hybrid power distribution system is effectively ensured.