The invention discloses a multipath output constant-current control circuit, and the circuit comprises a power conversion circuit. The output end of the power conversion circuit is connected with a plurality of output current collection modules, and the output end of each output current collection module is connected with a corresponding output load. The circuit also comprises an output current signal collection and processing module, wherein the signal input end of the output current signal collection and processing module is connected with a plurality of output current collection modules, and the signal output end of the output current signal collection and processing module is connected with the power conversion circuit. According to the invention, there is no need to set a constant circuit for each output, thereby enabling the circuit structure to be simpler and enabling the cost to be low.