Repair path of 3D laser cladding remanufacturing is studied and generation algorithm automatically of repair trajectory is proposed based on equidistant parallel sections in order to conquer the shortages using on-line teach processing path for damaged parts of complex free-form surfaces in laser remanufacturing. The positions of laser beam scan points are decided according the intersection points of any equidistant parallel section planes and triangular mesh; the normal vector of the intersection point is calculated by interpolation to the two vertices′ normal vector after each vertex′s normal vector is acquired, thus the laser beam′s posture is obtained at the processing point. Practical experiments demonstrate that satisfying results are acquired by using this method, which has been applied in laser remanufacturing system.