Abstract: Based on the gas and geology theories,the spatial variational law of gas parameters of coal bed is regarded as the function of geological condition of coal bed occurrence,and the numerical relations between gas contents' variety and its spatial distribution of Luling coal mine have been found out by applying the Trend Face Simulation Method and optimizing its simulation model.According to the numerical relations,the tasks that quantificationally forcasting the gas parameters values on a true and reliable level to the deep stopes of coal mine which have not been exploited yet.The method can be used in analysing other gas and geology variables that have the similar occurrence character.