Abstract: The testing method was used to evaluate the bond strength of high-strength coatings.In this test,symmetrical cuts were cut along the interface of the coating/substrate exactly by wire cutting,then the two sides were adhered and undrawn by tensile force along the interface of the coating/substrate.In order to get a precise evaluation of coating/substrate bonding strength,the stress distribution on the coating/substrate interface and the stress concentration of the crack tip were analysed by finife element method.The bonding strength of thermal sprayed layer with various processing parameters formed by sintering were determined by this method.The results show that the method can be used to evaluate the bond strength of high-strength coating and substrate.