Horizontal Directional Drilling is a kind of construction machinery laying a variety of underground utilities (pipelines, cables, etc.) without digging the surface of the ground. It is widely used in the laying of water supply, electricity, telecommunications, natural gas, gas, oil pipeline Construction, it is suitable for sand, clay, pebbles and other conditions, most of our non-hard rock areas can be constructed. Working temperature is -15 ℃ ~ +45 ℃. Horizontal directional drilling technology is a new construction technology combining directional drilling technology of petroleum industry and traditional pipeline construction method. It has the advantages of fast construction speed, high construction precision and low cost. It is widely used in water supply, Gas, electricity, telecommunications, natural gas, oil pipeline laying construction projects. Horizontal directional drilling Machine equipment, has also been rapid development in more than a decade, becoming a burgeoning industry in developed countries. At present, its development trend is toward large-scale and miniaturization, adapting to the automatic operation function of hard rock work, self-contained anchoring system, automatic stacking and extraction of drill pipe, automatic connection of drill pipe connection and electric shock prevention system, super- A wide range of applications and other characteristics of development. This kind of equipment is generally suitable for pipe diameter of φ300 ~ φ1200mm, PE pipe, the maximum pipe length up to 1500m, to adapt to a variety of soft soil to hard rock soil conditions, the application of a broad prospect.