The invention provides a large-scale anchor chock and anchor mouth lofting design method. According to the lofting design method, a three-dimensional space lofting principle is used for completing theoretical model construction, and a specific three-dimensional projection lofting method is adopted to complete the lofting of an intersecting line of the anchor chock and a ship hull plate and a contour line of an anchor chock upper basal plane; and at the same time, a tangency included angle of the anchor mouth and the anchor chock and a hawse pipe is obtained, a contour line of the anchor mouthis drawn, a three-dimensional shaded surface of the anchor chock and anchor mouth is constructed, and three-dimensional modeling work of the hawse pipe, the anchor chock and the anchor mouth is finished. The large-scale anchor chock and the anchor mouth lofting design method solves the problem that the lofting of anchor chocks and anchor mouths of various types of ships is low in efficiency and poor in precision, precision data of feeding, machining, and assembly locating are provided for a site, the work of field proofing and adjustment is simplified, and the installation efficiency and precision of the anchor chocks and the anchor mouths are enhanced.