Abstract: In a laser emission system, the high accurate docking of laser and theodolite ensures the high-precision orientation laser emission. For the under-the-machine docking, the Coude mirror space normalization theoretical model of the overall coordinate system based on the Coude optical path which transmits laser was established, and it accurately calibrated the position and variation of the laser in each Coude mirror space. Based on this theoretical model, a high accurate docking technology of laser and theodolite was proposed, which achieved the minute level of inner field and the second level of outside field. In a experiment of a long wave laser emission system, the technology realized a fast accurate docking which has an error of less than 2. Its correctness and practicality are verified from the engineering, it also provides the technical support for this type of docking of laser and theodolite.