Abstract: In order to improve the concentration of coal mine gas extraction, the trinity technology system was proposed with efficient hole sealing technology, pipeline connection, leak detection and plugging technology, negative pressure adjustment, network operation and management. It improving the gas concentration from the source, ensuring the gas concentration in the process of network transmission, and solving the problem of extraction pipe network management. Using this technology, the regional tests with 169 boreholes have been carried out in Yu’wu Mining S2108 tape area. The experimental results showed that under the condition of guarantee without reducing the pure volume of the gas extraction in branch pipes test, the concentration of coal mine gas extraction greater than other branch pipe obviously, increased from 11% to 25%. The increase of branch pipe gas extraction concentration improves the efficiency of the extraction system significantly, reducing the ability of the branch pipe diameter and the pumping station, reducing the costs of extraction. After increasing the concentration of branch pipe keeps away from the explosion limit, the safety of gas transport process is guaranteed. Therefore, it provides technical support for realization of gas cascade utilization.