Abstract: The coal measures strata was formed after experiencing multiphase tectonic movement, its geological conditions of gas occurrence and migration is very complicated, accompanying with several traits that the portfolio diversification structure of coal and complication of mine tectonic, homogenization of roof and floor rocks, hydrogeological conditions' differentiation. Given coal geological data in geology exploration period, it's hard to provide reliable geological basis for gas extraction and strengthening technique. In this paper, based on the application and practice in Zhongmacun Mine of Henan Energy and Chemical Industry Group, we carried out research on the gas extraction from geological unit division and evaluation methods. Through the systematic analysis of the mine geological structure, hydrogeology, coal seam and roof and floor combination characteristics and physical property characteristics, the gas extraction principle of division for geological units was determined. The study of the scientific classification and evaluation of mine pumping unit provides a scientific basis for mine gas scientific extraction deployment and strengthening anti-reflection technology design.