Corrosion test device capable of realizing alternating sample water depth

The invention relates to a corrosion test device capable of realizing alternating sample water depth, comprising a buoyancy tank, a winch system, a test frame, an automatic reel, a base, an acoustic releaser and a ballast block; the winch system is placed in the buoyancy tank, a sea opening is formed at the bottom of the buoyancy tank, a rope of the winch system passes through the sea opening andis connected to one end of the test frame, and the other end of the test frame is connected to the automatic reel by another rope; the automatic reel is fixed to the top of the base, and the bottom ofthe base is connected to the ballast block by the acoustic releaser. The device is simple in structure, convenient to use, and easy to assemble and disassemble. Alternating changes of the water depthposition of the test frame in the marine environmental corrosion test can be realized through the buoyancy tank, the winch system, a main cable, the test frame, the automatic reel and the concrete ballast block. The device can