This paper analyzes in detail the working principles, working process, insufficiency and influenee factors of paleostructure restoration accuracy and puts forward to the method of drawing paleostructure contour map under the control of balanced section. The study suggesls that the structure map ealled for "before deposition of one member" is the reflection of the structural rolling shape of botto,n surface after the member deposition and it is not one time's surface eonfigu ration. It is the superimposing result of all deformalions during the whole time. Dipping strata, well defleetion, difference denudation and horizontal shift of taults are the dominant influence factors of paleostructure restoration accuracy. The influence of sedimentary compaction is relatively small and the influence of paleo-bathymetry is the least which can be ignored. Thickness value can be read with the balanced section eontrol method based on stratum lapping, horizontal shift of fauhs restoration and the influence of difference denudation and compaction. It can exactly demarcate the location of paleofaults and more accurately express 3-D structural configuration in the period of geologic history.