For solving the problem of ensuring the synchronicity in the stroke adjustment process of two point press，based on the feasibility principle of crank press with adjustable stroke, and through the analysis of the existing adjustable stroke press regulation principle, the normal procedure of adjusting stroke by the rotation of the eccentric sleeve was broken, and a new structure through the rotation of the crankshaft to stroke regulating was designed. The two points and four points press stroke adjustment to ensure synchronization problem was solved perfectly. Taking the single shaft type double stroke adjustable press as an example, the regulating structure principle was explained in detail. The structure of the key parts was designed and the model was set up. The relationship curve among the important parameters was given.