根据调制度排序，提出了一个新的用于模型全场光弹条纹级次测量的位相展开方法，并进行了实验验证。在位相展开区域的边界上，位相展开的路径由像素的强度调制决定。这个方法的优点是很明显的，即使在最坏情况下，其误差也限制在局部最小区域上。 According to the order of modulation degree, a new phase unwrapping method for the full-scale photoelastic streak level measurement is proposed and verified by experiments. On the boundary of the phase development zone, the path of phase development is determined by the intensity modulation of the pixel. The advantage of this method is obvious, even in the worst case, the error is also limited to a local minimum area.