The utility model discloses X-ray machine conveying, positioning and exposing equipment for a circle butt welding joint of a pipeline. The X-ray system conveying, positioning and exposing equipment comprises a vehicle body part, a machine body part and a push rod, wherein the vehicle body part comprise a vehicle body, wheels, a front support and a rear support; one end of the push rod is connected with a pipe connecting end of the rear end of the vehicle body; an X-ray machine is mounted in inner grooves of the front support and the rear support; the machine body part comprises a front hoop strip ring, a rear hoop strip ring, a hoop strip cross arm, a laser positioning mechanism and a camera positioning mechanism; the laser positioning mechanism comprises a laser positioning pipe; a laser is mounted in the laser positioning pipe; the laser positioning pipe is rotatably arranged on the front hoop strip ring. Compared with a conventional double wall-single image outside radiography, the equipment has the advantages that the detection efficiency is improved by five or more times, and the detection quality is improved actually; as compared with a semi-automatic pipeline center exposure device, the weight of the equipment is one tenth of that of the semi-automatic pipeline center exposure device, charging is not required, the disassembly and assembly are quick, the operation is simple and convenient, and the detection efficiency is averagely improved by 30%.