Mud system of horizontal directional drilling machine and horizontal directional drilling machine

The utility model discloses a mud system of a horizontal directional drilling machine and the horizontal directional drilling machine. The mud system comprises a mud stirring tank, a pipeline, a hydraulic motor, a mud pump, a rotating joint, a branch pipeline, a high-pressure ball valve and a rubber pipe. The hydraulic motor is connected with the mud pump, and the mud stirring tank, the mud pump and the rotating joint are connected in sequence through the pipeline. One end of the branch pipeline is connected to the lowest position, between the mud pump and the rotating joint, of the pipeline, and the other end of the branch pipeline is connected with the high-pressure ball valve. The rubber pipe is connected with the high-pressure ball valve. According to the mud system of the horizontal directional drilling machine and the horizontal directional drilling machine, the high-pressure ball valve, the rubber pipe, the branch pipeline and the like are additionally arranged, after the horizontal directional drillin