Abstract：Aiming at the problem that TC4 titanium alloy blade is easy to deform due to residual stress in shot peening process, numerical analysis and experimental study on shot peening process of titanium alloy blade were carried out. Firstly, the shot peening parameters of blade are determined. The corresponding relationship between shot peening speed and residual stress is found by shot peening simulation of single shot. The residual stress generated in shot peening process is compared by numerical simulation and actual detection, so as to determine the parameters such as shot peening speed. Then, in order to study the influence of different shot peening sequence on blade deformation, three shot peening path technologies are designed to realize the planning of blade shot peening path, and the reliability of the planning path is verified by experiments. The simulation and experimental results show that the deformation of the blade is mainly along the Y–direction after shot peening, and the deformation trend of the blade is from the inner arc side to the back arc side. The deformation degree of the blade varies with different shot peening paths. When the “back arc inner arc” shot peening method is adopted, the deformation in the Y–direction is the smallest, and the minimum value is 0.182mm. The deformation of blade is different with different shot peening paths. Finding an appropriate shot peening path can effectively reduce the blade’s shot peening deformation. Based on the simulation and shot peening path planning, a certain amount of pre-compensation is given in the machining process to make the blade reach the predetermined shape after shot peening deformation.