Abstract: In order to meet the technical requirements about the dense arrangement of holes on roadway floor anchoring construction, frequent move of drilling rig and high construction efficiency, the new type of ZDY750L drilling rig for anchoring of floor anchoring in coal mine was developed. It adopts split and crawler structure, has small width, high mo- bility in underground coal mine. Swing arm mechanism completes the construction of two roadway floor anchoring holes with one stop. The results of industrial test in conveyor roadway of southern district of seam 3 in Xinyuan Mine showed that the ZDY750L drilling rig has simple operations, good flexibility, accurate positioning and good adaptability in un- derground coal mine, can reduce the labor intensity, improve the operating environment, realize the function of efficient construction of floor anchoring hole and provide technical support for control of roadway in coal mine.