In order to improve the sealing performance of gas sealing between compressor stages,based on the traditional hexagon honeycomb,the square honeycomb and circular honeycomb were obtained by changing its structure,the effect of the honeycomb structure on the sealing performance of the labyrinthhoneycomb seal were numerically studied,and the sealing characteristics and sealing mechanism of the four seals,the labyrinth seal,the hexagonal honeycomb seal,the square honeycomb seal and the circular honeycomb seal were comparatively analyzed in cases of different seal clearance,pressure ratio and rotation speed.The results show that the leakage of the four seals are increased at an approximately linear rate with the increase of clearance,and the increase rate of the leakage of labyrinthhoneycomb bushing seal is slower than that of labyrinthsmooth seal since the honeycomb destroys the flow field ventilation effect.Among the three labyrinthhoneycomb seals,labyrinthcircular honeycomb seal has the best sealing effect.With the increase of pressure ratio,the leakage of the four seals is increased,but the growth rate gradually becomes slower due to the formation of strong whirlpool in labyrinth and honeycomb cavity.With the increase of rotational speed,the fluid circumferential velocity is increased,the leakage of the four seals is decreased,and because the honeycomb circumferential cuts fluid and forms a whirlpool to dissipate energy,the leakage of labyrinthhoneycomb seal is decreased greatly.Under the condition of large clearance and high pressure ratio and high speed,the labyrinthhoneycomb seal has better sealing effect,among which the labyrinth circular honeycomb seal has the most advantage.