Based on static oxygen consumption test,the equation of oxygen consumption rate for coal oxidation at low-temperature was established according to the chemical kinetics.And the relation equation of oxygen concentration and temperature was built by using Agrawal approximate method.The results obtained by least square fitting show that within temperature range of 40℃ to 80℃ the reaction order relating to the oxidation of gas coal in Chaili mine is 3,within temperature range of 80℃ to 130℃ it is 2,and within temperature range of 160℃ to 190℃ it is 1.5.Activation energy E and the pre-exponential factor A for the four temperature ranges were obtained by use of least square method,and the rationality of the oxygen consumption function was approved by kinetic compensation effects.