Horizontal directional drilling rig is a construction machine that lays a variety of underground utilities (pipes, cables, etc.) without digging the ground surface. It is widely used in flexible pipelines such as water supply, electricity, telecommunications, natural gas, gas, and oil. In laying construction, it is suitable for sand, clay, and other land conditions. The groundwater level is high and the pebble stratum is not suitable for construction in most non-hard rock areas in China. The working environment temperature is -15 ℃ ~ + 45 ℃. Horizontal directional drilling technology is a new construction technology that combines the directional drilling technology of the petroleum industry with traditional pipeline construction methods. It has the advantages of fast construction speed, high construction accuracy, and low cost. It is widely used in water supply, Gas, electricity, telecommunications, natural gas, petroleum and other pipelines are being laid. Horizontal directional drilling equipment has also developed rapidly in more than ten years, and has become an emerging industry in developed countries. Its development trend is toward large-scale and miniaturization, adapting to hard rock operations, self-contained anchoring systems, automatic stacking and extraction of drill pipes, automatic lubrication of drill pipe connections, anti-shock systems, and other automated operation functions, super-depth guided monitoring, and applications Wide range of features. This kind of equipment is generally suitable for steel pipes and PE pipes with a pipe diameter of φ300 ~ φ1200mm, and the pipe laying length can reach 1500m, which is suitable for a variety of soil conditions from soft soil to hard rock, and has a broad application prospect.