Abstract: Based on the hypothesis that deformation district is formed with several blocks of elastic deformation bodies,a more general deformation model is proposed,and on this occasion,the state equation of plane monitoring network is given.The problem of initial state parameters and their variance matrix is solved in this paper.Under the principle of maximum-likelihood,the formula of variance of dynemic noise is obtained,which is corrected in every stage.After computing and analysing some plans,some useful conclusions and suggestions are given in the paper.