Abstract: According to the serious deflection occurred on the headframe of the mine main shaft in a mine affected to the safety of the mine hoisting system, the en gineering drilling exploration and static sounding with the indoor test combined technology were applied to the analysis on the deflection causes.The analysis results sh owed that the main causes of the headframe deflection were the subsidence of the inclined support base occurred by the compression and consolidation of ground soil i n the foundation of the inclined support base for the headframe and the headframe was affected by the self strength of the headframe, headframe base and other factor s.With the prediction on the residual deformation value of the ground soil in the foundation of the inclined support base and the analysis on the stability of the inclined s upport base, a deviation rectfication plan with the longer and level raised method of the inclined support was provided and a deviation rectification and reinforcement W as conducted on the headframe of the main shaft.