Abstract: Under the influence of surface fissure air leakage in 72104 working face of Okhobrak Coal mine, low oxygen gas gushed out from the working face to the adjacent goaf through the air leakage channel, resulting in low oxygen phenomenon. In order to effectively solve the low oxygen problem of the 72104 working face in the mine, this paper studies the abnormal distribution of pressure energy and air leakage law of the working face and surrounding roadway through the field pressure energy measurement, and uses the pressure equalization ventilation technology to prevent the low oxygen phenomenon in the corner of the working face by changing the leakage field of the working face. The results show that when the air flow passes through the inlet and return corners of the working face, the pressure energy decreases by 60.2 Pa, and there is an abnormal decrease, but no abnormal pressure energy is found at the other measuring points. The pressure equalization system of 72104 working face achieves the expected pressure regulation effect through the comprehensive use of the joint control means of fans and air windows. It is estimated that the maximum pressure-boosting value of the working face is 365.9 Pa after the pressure equalization technology is adopted in the return air corner of the working face, which can greatly reduce the pressure and energy difference of the corresponding surface position and working face, and effectively reduce the air leakage and low-oxygen gas emission of the 72104 working face. The oxygen content of the working surface is maintained at the normal level to realize the efficient production of the mine.