Abstract: To study the influence of wedge angle disturbance on the structure of oblique detonation, two-step reaction model was used to construct two dimensional reaction Euler equations. The time variable was introduced into the LevelSet function to describe the moving wedge. The influence of wedge angle disturbance on oblique detonation was simulated, and simulation results are that: as the wedge angle increases, the induction length becomes shorter, the structure of oblique detonation changes from abrupt transition to smooth transition, the angle of oblique detonation increases and the oblique detonation moves upstream; as the wedge angle decreases, the induction length becomes longer, the structure of oblique detonation changes from smooth transition to abrupt transition, the angle of oblique detonation decreases and the oblique detonation moves downstream. Complex wave structure evolution will occur in the whole process.