In order to meet the design requirements of airbearing table of large stroke raster engraving,the finite element model of gas film was established，and the effects on the gas film characteristics of the airbearings by different layouts of restrictors and pressure groove structures were analyzed with load capacity,gas consumption,and dead zone velocity as the main indexes.The results reveal that the different airbearing structures will cause various pressure characteristics,which will impact the load capacity,gas consumption and dead zone velocity.The structure of 3×3 restrictor and Wangshaped pressure groove can improve the load capacity,eliminate dead zone velocity of the airbearings and increase gas consumption slightly,it can meet the long time working requirements of airbearing table for large stroke raster engraving.