The utility model relates to the technical field of petroleum drilling sealing devices, in particular to a testing device for an annular sealing assembly sealing body. According to the technical scheme, the universal annular sealing assembly testing device can be used for testing different types of sealing assemblies; the well head and the test casing hanger are used as a main body structure of the test tool; a well head inner seal is arranged on the well head; a second locking ring groove, a well head inner sealing surface, a well head sealing surface, an upper pressure inlet and a lower pressure inlet are formed in the test casing hanger, a test casing hanger sealing surface, a test casing hanger setting step, a casing hanger step, a third seal and a sealing ring are arranged on the testcasing hanger, and an O-shaped ring, an upper seal and a second seal are arranged on the feeding carrier. The utility model provides the testing device for the sealing body of the annular sealing assembly, which can be used for testing different sealing bodies of the sealing assembly by using one set of tool, can ensure the testing stability and is suitable for detecting newly developed productsand existing products.