Abstract: Thedeformationoflargeflexiblemeshantennaundergravityloadisremarkableandmixedwiththemanufacturingerror，whichbringtremendoustroublestothesurfaceaccuracyadjustingwork.Tosolvetheproblem,firstly,thearticleexpatiatedallkindsofsurfaceerrorsexistinginthereflectormanufacturingandworking;secondly,thearticleprovidedandcertifiedthecorrelationsamongtheerrorsespeciallymanufacturingerrorandsurfaceerrorswhenthereflectorisputCupupandCupdown.Byapplyingthosecorrelations,theeffectonthereflectorsurfaceerrorboughtbygravitycouldbedecreased,whichprovidedgreatadvantageforsurfaceaccuracyadjustingonground.Tomeettheengineeringrequirement,aflowchartofhowthesurfaceaccuracywouldbeadjustedwasproduced.Itcanreducethereversalfrequencyofreflectorandsavetimeduringsurfaceaccuracyadjusting.

Key words: flexiblemeshspaceborneantenna, onground, surfaceerror；correlation, surfaceaccuracyadjusting