Abstract: In order to study the influence of gas on coal burst tendency,the burst tendency index of coal samples was measured under different gas pressures,the energy accumulation and dissipation of coal samples under multi-stage cy- clic loading and strain loading were analyzed. The results show that under the combined action of pore pressure and adsorbed gas,the burst tendency index of coal sample changes from strong to weak or weak to direct;the gas reduces the strength of the coal sample,and the dissipation energy due to the damage and plastic deformation increase during the multistage cycling process,the ability of coal samples to store elastic strain energy decreases,when the coal sample is completely destroyed,the surplus energy decreases,thus,the gas weakens the burst performance of coal. With the in- crease of gas pressure,the energy drop coefficient becomes larger,it indicates that the failure form of coal samples changes from brittle to brittle-plastic. Based on the influence of gas on burst tendency and the form of failure of coal, when measuring the burst tendency and evaluating the rock burst risk of gas containing coal seams,the influence of gas on the burst performance of coal seams should be taken into a full consideration.