Dual-SAR interferometry shows great potential for detecting the slow ground moving targets.Firstly，according to a performance analysis and comparison of the slow ground moving target detecting algorithms based on interferometry，all the algorithms are divided to three categories.Then，on the basis of analyzing the basic detection theory of each interferometry algorithm，this paper illuminates their advantages and disadvantages.By combining with the simulated results，further analysis and comparison are conducted in terms of detection probability and false alarm probability，the stabilization，the range of detection velocity，anti-jamming.Finally，by summarizing the disadvantages of each interferometry algorithm，this paper indicates the practical use of interferometry for detecting slow ground moving targets.