The utility model provides a crawl control system of carrier of underwater welding, power module including a multichannel dc supply, the underwater lighting module of an illumination fore -and -aft direction, underwater lighting module electricity press bond power module voltage output end, a monitoring is inclination's angular transducer all around, angular transducer electricity press bond powermodule voltage output end, the underwater welding carrier track of creeping is connected to a drive and a power drive module of collecting motion information, the 2nd voltage output of power drive module electricity press bond power module end, output, a collection power module voltage variation and control output and control angular transducer and the circular telegram work of power drive moduleor the control module who stops, control module connects power module A third voltage output and control end respectively, still connects angular transducer input and power drive module input. Implement the utility model discloses, have advantages such as simple structure, the control degree of difficulty is lower, the conversion of power supply device power is few.