Abstract: With the continuous progress of coal mining technology, the traditional roof cutter pressure relief coal mining method is facing the problems of high safety risk, complex operation and low efficiency. In order to solve these problems, the KQL7/110 mining chain arm roof cutter machine is developed. The equipment adopts advanced chain arm cutting mechanism, which can achieve accurate cutting of the roof, effectively solve the common problem of some pre-cracking holes are not opened into joints in traditional pre-cracking blasting, significantly improve the roof cutter effect and the regularity of roof collapse, thereby reducing the difficulty of roadway maintenance in the later stage. In addition, the KQL7/110 mining chain arm roof cutter machine is equipped with an intelligent control system, which realizes automatic operation, greatly reduces manual participation, and improves the safety and efficiency of the operation. In practical application, KQL7/110 mining chain arm roof cutter machine in 42204 auxiliary transportation lane has a remarkable effect of roof cutter pressure relief, which realizes the complete collapse of the roof along the cutting seam and greatly improves the effect of roof cutter pressure relief. Compared with the traditional blasting roof cutting method, the equipment significantly reduces the construction cost and the amount of roadway maintenance, and improves the recovery rate of coal mining, extends the mining service life of the mine. By collecting a large number of test data, it provides a scientific basis for equipment performance optimization and process improvement. The successful application of KQL7/110 mining chain arm roof cutter machine marks an important step for the development of coal mine roof cutter technology in the direction of intelligence and green. In the future, the coal mining process will continue to develop in the direction of intelligence, focusing on the integration of information technology, automatic control technology and robot technology, in order to realize the automation, information and intelligence of coal mining. This will not only improve production efficiency and safety, but also effectively reduce environmental pollution, in line with the requirements of green development.