Abstract: Three-dimensional numerical model of shaft Ingate is constructed based on the data of measured situ stress field by the paper. Though selecting a number of characterized evaluation index for stability of Ingate, volume numerical analysis for stability difference is carried in different directions between Ingate and principal stress, then original relationship between Ingate’s stability and situ stress field characteristics is studied. The results showed that shaft's stability is greatly influenced by the relative orientation relationship between directions of shaft and situ stress field, so that a basis for design, supporting, and stability evaluation of shaft Ingate is provided.