Abstract: According to the theory and method of coal seam gas occurrence pressure buildup curve in the determination of parameters, the rapid determination of parameters such as coal seam gas pressure, gas content and permeability coefficient was implemented. Using gas pressure, coal seam temperature and gas flow rate 3 parameters, and through EDA9017 acquisition module, RS485 interface and intrinsic safety display, the communication and display of coal seam gas parameters was completed. According to the mathematical model, using least square method to fit gas pressure buildup curve and automatically calculate the slope of pressure buildup curve, coal seam gas occurrence parameters are obtained. The device is designed as intrinsic safety for high gas environment.