Abstract: By testing the fused-flux of various ingredient and the ceramic-flux of various alloy content in complex surfacing,effect laws of main ingredient and content and slag series on surfacing layer are examined.Among suitable content and ratio of various alloy elements,both contents of complex degenerate agent and activator,as well as rational adjustment of slag series are all studied.A very good prescription of ceramic-flux and a suitable fused-flux have been found out.Moreoverm,thsted the hardness and resistance to wear and crack,as well as metallographic structure in surfacing layer.Finally,a surfacing complex alloy of high hardness and wear-resistand has been created,which does not crack at room temperature and not reduce resisting of abrasive-surface and the hardness of its surfacing layer is keeped with 60HRC.It provided fixed reference data for automatic submerged arc welding of various huge abrasive-surface.