Abstract: In order to compare the advantages and disadvantages of several 3-D reconstruction methods, an evaluation method was adoped for theoretical analysis and experimental verification. The wrapped phase error model of fringe noise interference was established, and the maximum variance of the wrapped phase error was obtained. Then the reliability of three classical dual-frequency phase unwrapping algorithms was analyzed and compared. The results show that the dual-frequency four-step phase-shifting algorithm 4f_h+4f_l has the strongest anti-interference ability, and its reconstructed object surface is smooth and wrinkle-free. The second is the 3f_h+3f_l algorithm, whose phase errors are 169.7% and 126.9% of those of 4f_h+4f_l. Finally, the 3f_h+2f_l algorithm has a large number of folds on the reconstructed shapes, and the measurement accuracy is the worst. The phase errors of the 3f_h+2f_l algorithm are 442.6% and 388.8% of those of the 4f_h+4f_l algorithm. However, compared with the 4f_h+4f_l algorithm and the 3f_h+3f_l algorithm, the measurement efficiency is improved by 37.5% and 16.6%. This study provides a method to evaluate the advantages and disadvantages of each dual-frequency phase shift method and provides a reference for the selection of the above three methods.