Abstract: In present paper,the effect of distance from boundary to hole center and hole to hole on the accuracy of blind-hole technique are discussed on the basis of Kirsch elastic solusion and solusion of 3D.F.E. calculation.Analysis shows that the boundary and distance between holes have effects to a certain content and moreover the effect of distanee between holes is related to direction of loading.Experiments verifred the obtained analytical conclusions. Finally,the transverse and longitudinal minimum distance between noles d_min and d_min and the minimum distance from hole to boundary d_min are detemined. It provides necessary basis for obtaining accurate and reliable stress value with blind-hole method.