There is no clear conversion relationship between the shear strength of vane test and the bearing capacity of the foundation in the current national standards and relevant detection standards of water transport engineering,which leads to the inconsistency of the evaluation criteria of the bearing capacity of the foundation by vane test.This paper compares the conversion formulas for estimating the bearing capacity of foundation by shear strength of vane test in the codes of geotechnical investigation,highway and railway foundation design.Taking an example of soft foundation reinforcement and testing project,this paper estimates and verifies the bearing capacity by various formulas.The results show that the simplified formula deduced in accordance with Code for Design of Building Foundation is more suitable for evaluating the reinforcement effect of soft foundation treatment,and can be used as the basis for checking the bearing capacity of soft foundation reinforcement by vane test.