Switching power source circuit and industrial gateway system

The invention discloses a switching power source circuit and an industrial gateway system. The switching power source circuit comprises a switching power source module and a voltage isolation module;the switching power source module is used for converting an incoming power source into a high-frequency power source; the input end of the voltage isolation module is connected with the switching power source module; the voltage isolation module includes a plurality of output ends; and the plurality of output ends of the voltage isolation module are electrically isolated from one another. The voltage isolation module can perform voltage transformation processing on the high-frequency power source outputted by the switching power source module, so that the high-frequency power source can meet the requirements of subsequent connection loads; the voltage isolation module can electrically isolate an input voltage from an output voltage, filter out the interference of the input voltage, improvethe stability of the outp