Vehicle mounted reverse circulation drilling rig is an electric rotary drilling rig, which is an ideal drilling machine for cast-in-place piles. It embodies the new technology of multi-purpose use of one machine. Make the drilling rig more versatile and suitable for a wider range of geological formations. It is suitable for foundation construction in various complex formations such as silt, clay, gravel layers, weathered rock shale, and more suitable for gravel layers. Therefore, it is an ideal equipment for bridge, construction, water conservancy, power, telecommunications, engineering precipitation and other large and small caliber deep foundation engineering construction.