The invention discloses a method for building a virtual mannequin based on bodily form of actually measured crowd, which comprises: a) due to direct method of measurement, 100-400 human body samples are chosen according to different districts and age periods, and 40-70 unary data are obtained by measuring various parts of human body; b) the data are analyzed, the data of medium bodily form of different districts and age periods are obtained; c) the samples of not less than 200 people are chosen for carrying out 3D untouched type human body measurement; d) 3D model of human body is pretreated,standardization is carried out by using cloud data of human body model, at least 100 mannequins are obtained, the better is 120-180 sections, each section uses 40-70 mannequins, and the better is representation of 66 data points; e) 3D average form of the sample of human body model is calculated, and the 3D virtual mannequin is obtained by revision disposal. According to the method of the invention, mannequin entity satisfying actually measured bodily form can be formed in a short time; and according to different districts and age periods, bases and data are provided for suitability of clothes production, virtual fitting and cutting-out, clothes function study, specification standard and antitype of bodily form of the people in our country. The period for designing mannequin is shortened.