The utility model belongs to the technical field of the leakage detection system and specifically relates to a data acquisition device for leakage detection system is disclosed, including possessing the second parts that show the function, still including connect data collection station, can receive data collection station in the first parts of data, the second part is connected to this first part, first part includes memory, charging battery unit, communication unit, reaches and connect the treater of memory, charging battery unit, communication unit, second part connecting communication unit. The utility model discloses a function that first part possesses independent message pick -up, processing, saves and upload has reduced the burden of second part, and then the stability when guaranteeing data acquisition, quick, reliable.