In order to solve the problems of low efficiency(direct tension test method (GJB772A-1997)) and poor test accuracy (indirect Brazilian test method) intraditional tensile strength testing of polymer bonded explosive (PBX), we independently established a test plat form based on the hydraulic fracturing method (HFM), developed a novel test method of PBX tensile strength, and achieved accurate testing of PBX tensile strength. To further verify the validity of the test method, the tensile strength of the same PBX dumbbell samples was obtained through direct tension test method and HFM, and the test results were compared. It showed that the relative error between the tensile strength by HFM ((9.49±0.24) MPa) and the tensile strength by direct tension test method ((9.24±0.43) MPa) was only 2.70%, showing the high accuracy. Moreover, the HFM can obtain at least four effective tensile strength data on the on the single dumbbell remnant samples. Compared with the direct tension test method, HFM has the characteristics of less material consumption, high efficiency, and good stability for PBX tensile strength testing. It indicates that the HFM has the advantages of the high accuracy in the direct tension method and high efficiency in the Brazilian test. Therefore, HFM can be widely applied in the in-situ test method for formulation development and tensile strength test of different positions of PBX structural components.