Abstract: Improvement and modification have been done to the Hopf bifurcation dynamic stall model:introducing the Wagner function to compute the effective angle of attack under attached flow,redesigning the boundary layer reattachment term,and establishing the equations of drag and pitching moment. Compared with ONERA model and Leishman-Beddoes model,the new model shares the best coherence with analytical theory in amplitude and phase characteristics under attached flow. For separated flow,the new model has better accuracy than the others in most cases and captures better primary dynamic stall vortex fluctuation. The multi-stage vortex in deep stall can be also computed by the new model. Analysis under light stall reveals that the modeling of circulatory terms of all models can be further improved for this regime.