To solve the problem that the traditional dual-frequency method cannot meet the requirement of high precision measurement, an enhanced dual-frequency phase unwrapping method based on the regional quantification algorithm is proposed. In this method, unstable fringe orders are first obtained by the dual-frequency method, and the fringe orders are divided by the regional gray-code map. Then, the fringe orders corresponding to all the pixels in each region are sorted and the median value is obtained. Finally, the obtained median value is assigned to the corresponding the fringe orders of all pixels in this region. The quantified fringe order is unique and stable, so the method can obtain accurate absolute phases. Simulation and experimental results demonstrate the feasibility of the proposed method. Compared with the traditional dual-frequency method and three-frequency method, the proposed method reaches the measurement speed as that of the dual-frequency method and the measuring precision as that of the three-frequency method.