A surface treating method for a golf club head includes applying polishing pretreatment on a golf club head and grinding at least one surface of the golf club head with a resilient grinding rod. The resilient grinding rod includes at least one resilient matrix and at least one kind of grinding particles. The resilient matrix is resin or rubber. The resilient matrix has a hardness within a range of Shore A 70 and Shore D 80. The resilient grinding rod includes a grinding end that possesses an inclined grinding face having inclination with an angle .theta. with respect to a longitudinal axis of the grinding rod.