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When laser shocks the connecting surface which is a circle angle area between crankshaft connecting rod and crank, it can't make the beam vertical to the tangency direction of each point on the surface, so it is called oblique laser shock processing. In the paper, the laser oblique shocking the connecting surface experiments were carried out via the Nd:glass laser machine at Jiangsu University. The results show that the micro-hardness of the laser shock area increases about 65%～75% than that of non-shock area, the residual stress increases about 80%～100%, and the using life increases about 150%. The biggest increasing area of micro-hardness and the residual stress is the center of the circle angle, which is the area of being easy to produce the fatigue crack. The edge of the circle angle is the non-sensitivity area of the fatigue intension that can't affect the crack producing.