Abstract: The geometric configuration of a spatial structure often needs to be determined by partial measured nodal location for the structural analysis in construction process monitoring and structure inspection. Thusly, an imperfection-introduced method, named stochastic imperfection propagation method (SIPM), was proposed and the deviation propagation principle was established. This method can reckon the geometric imperfection according to the information of limited deviation-known nodes. Based on the stochastic deviation theory, it was verified that the distribution of imperfection introduced by SIPM is in accord with a normal distribution. Further, the coordinate measurement and stability analysis were carried out on a reduced-scaled K6 reticulated shell. The numerical results show that:compared with the stochastic imperfection method and consistent imperfection mode method, the goodness of fit of imperfection generated by SIPM is higher and the calculated load-carry capacity based on SIPM is more closed to the theoretical load-carry capacity of structure than those of these two methods. Meanwhile, the median load factor based on SIPM is more reasonable to be taken as the representative value of actual load-carry capacity.