The invention discloses a headband strength tester of a self-suction filtration type respiratory protective article. The tester comprises a base I (1) and a base II (2), wherein a model bracket (3) isfixed on the base I (1), a head model (6) is movably installed on the model bracket (3), one side of the head model (6) is connected with a mask fixing belt (7), and a buckle (8) is arranged on the other side; after a to-be-tested protective mask is placed on the head model (6), the mask fixing belt (7) on one side of the head model (6) winds around the protective mask and is tightened by the buckle (8), and the protective mask is fixed on the head model (6). The technology of the device is easy to reproduce, work efficiency is improved, labor intensity is reduced, safety of testers is ensured, and accuracy of test results is improved.