The invention discloses an industrial mechanical arm precision calibrating method based on collaborative Kriging and belongs to the technical field of robots. A device used for the method is composed of an industrial mechanical arm, a laser tracker and a target ball. The target ball is fixed to the tail end of the industrial mechanical arm and serves as a tool center point. According to the method, actual coordinates of some points are measured through the laser tracker; then position errors of theoretical coordinates and the actual coordinates of the points are obtained; and by building a crossover variation function and adopting a collaborative Kriging interpolation method, the position errors of the points in the movement space of the industrial mechanical arm are estimated. The method is simple, it is not needed to build a kinetic model of the industrial mechanical arm, and the method has the beneficial effects that universality is good, the running precision of the industrial mechanical arm can be improved, and inner parameters of an industrial mechanical arm controller device are not needed to be modified.