As an important parameter in the process of exploration and development of CBM reservoirs, gas logging plays an important role in reservoir fluid identification, fracturing and layer selection, and production capacity prediction and its magnitude is affected by multi-factors of coal seam geology-engineering. In this paper, based on the principle of material balance and desorption-seepage, a multi-factors control model of gas logging is established, and the calculation results show that: the value of gas logging is positively correlated with the drilling time, drill bit size, displacement, desorption pressure, and the physical properties of reservoir, and is negatively correlated with the drilling fluid density, borehole depth, and supply radius. The calculation results show that: gas logging value is positively correlated with drilling time, bit size, displacement, desorption pressure and reservoir physical properties, and negatively correlated with drilling fluid density, borehole depth and supply radius; through the statistics of the relationship between gas logging value and stable production capacity in Zhengzhuang field, it is believed that gas-logging value is positively correlated with stable production capacity, based on which an all-round high production guarantee system guided by gas logging with fine geological division selection, optimal well deployment, quantitative drilling and well completion, multi-indicator fracturing and section selection, and optimal drainage and mining management control has been established.