Aiming at the problem that the bottom of deep drilling shaft wall is easy to produce cracks in the process of pouring, curing and sinking, taking the north air shaft of Taohutu Coal Mine as the engineering background, the stress analysis of the bottom of deep drilling shaft wall and the development and application of high performance fiber concrete are carried out. The stress analysis of the bottom of the semi-elliptical rotating flat spherical shell shaft wall is carried out by numerical simulation method, and the key tensile stress area is identified. The results show that there is a significant tensile stress area outside the top of the bottom of the shaft wall, and the maximum principal stress reaches 0.56 MPa, indicating that there is a risk of tensile cracking in the concrete. Through material optimization and orthogonal test, the optimal mix ratio of fiber concrete C75 at the bottom of the shaft wall is cement : fly ash : ground slag : stone : sand : water : water reducing agent : fiber = 400 : 75 : 85 : 1011.8 : 732.6 : 145.6 : 13.44 : 2.0. The crack resistance of fiber reinforced concrete and ordinary concrete was compared by plate crack test. The results showed that the crack resistance of fiber reinforced concrete was significantly better than that of ordinary concrete. The application of the mix ratio in the engineering site shows that no cracks appear at the bottom of the pouring shaft wall, thus ensuring the construction quality of the bottom of the shaft wall. The research results of this paper can effectively solve the problem of construction cracks at the bottom of the wellbore in deep drilling, and effectively improve the anti-cracking and anti-permeability of the bottom structure of the wellbore and the construction safety.