Abstract: We propose a quantized quality-guided phase unwrapping algorithm.The quality values of the quality map are denoted by integers.A priority queue consisted of a static array and many doubly linked lists is introduced.The relation between the integral quality values and the indexes of the array is established and priority queue keeps all the pixels by their quantized quality in a non-decreasing order by maintaining the doubly linked lists in an increasing order.The tests performed on interferometric SAR data and simulated InSAS interferogram confirm the high efficiency of the proposed algorithm.