The loess tunnel is widely constructed. The characteristics of loess cause lining cracking under different disaster-causing factors, which weakens the supporting capacity of surrounding rock, and cannot effectively restrain the surrounding rock, causing damage such as falling blocks and serious collapse. Therefore, the research on the treatment measures of loess tunnel lining is needed. Based on the 3 # tunnel of Baijiashan in Shanxi Province, aiming at the disease characteristics of lining cracking of loess tunnel, the three-dimensional finite element numerical simulation method is used to study the supporting effect of 4 treatment measures (anchor rod, jet grouting pile, inverted arch and grouting layer) on lining cracking of loess tunnel. Through the evaluation of the stress of the tunnel lining and the deformation and stress of the surrounding rock, the lining cracking treatment scheme is optimized and compared. The influence of the lining cracking on loess tunnel is minimized, and the safe operation of the loess tunnel is ensured.