The invention relates to a reaction kettle for an upper deck simulative corrosion test of an oil hold and a using method of the reaction kettle. The reaction kettle comprises a kettle body (15) and a kettle cover (14), wherein distilled water is contained in the kettle body (15) and the kettle cover (14) penetrates through a gas inlet pipe (9) and an exhaust pipe (10); a test sample groove is formed in the lower wall of the kettle cover (14), a test sample loading device is arranged in the test sample groove, and the test sample loading device comprises a pushing oil cylinder (7), a reinforcing plate (6) and a bearing plate (5); two bumps are formed on the lower surface of the bearing plate (5), a test sample temperature adjusting plate (12) is fixedly assembled between the two bumps, chutes are further respectively formed in the bumps oppositely, and the test sample (8) is carried in each chute; a bottom heating element (1) is arranged at the bottom of the kettle body (15), an electric heating wire is arranged in the test sample temperature adjusting plate (12), and the bottom heating element (1) and the test sample temperature adjusting plate (12) are electrically connected with an external power supply. The reaction kettle provided by the invention is simple in structure, low in power, sensitive to control experimental parameters and convenient to operate for fixing the test sample.