The invention provides an integrated frequency difference method of a cable stayed bridge cable tension test. The method comprises the following steps: firstly, reading three frequency values fi, fj and fk which are corresponding to a first peak, a second peak and a third peak in an auto-power frequency spectrum graph of a tested cable actual measurement acceleration time history; secondly, obtaining a fundamental frequency initial value f by utilizing the three frequency values corresponding to the three peaks; thirdly, determining a possible order corresponding to each frequency; finally, determining basic frequency fv and cable tension T. According to the invention, calculation is simple, operation is carried out according to a process, other complex determination and processing processes are not needed, result accuracy is raised, technology difficulty in a cable tension test is substantially reduced, by employing the method, high efficiency is realized, data analysis processing time can be saved, test cost is reduced, and economy is good.