Abstract: In order to effectively prevent gas overrun at upper corner of mining face, according to practical experience of recent years, the principles of preventing gas overrun methods at upper corner of mining face and the specific implementation process are introduced in detail, and the problems of using these methods should be noted are described. Practice shows that each method has its own specific conditions, and the gas overrun at upper corners of mining faces in different mines has their own specific characteristics, specific issues must be analyzed specifically.