The utility model discloses a test device capable of preparing deleterious medium solutions. A pressure accumulator is communicated with a pressure supply pipe through a relief valve, the other end of the pressure supply pipe is communicated from the upper end of a transparent container to an inner cavity thereof through a check valve, the circumferential wall of the transparent container is provided with a water jacket, the water jacket is communicated with a constant temperature water supply device through a pipeline, a slotted window is vertically arranged on the water jacket, the upper end of the transparent container is communicated with a gas outlet pipeline through a check valve, the other end of the gas outlet pipeline is communicated with an absorption tank containing alkaline medium, a stirring rotor arranged inside the transparent container is driven to rotate by a stirring device arranged at the bottom portion of the transparent container, a gas storage tank is communicated with a gas outlet pipe through a decompression valve, the gas outlet pipe is communicated with a gas supply pipe and a liquid conveying pipe through a check valve, the gas supply pipe is communicated with the transparent container through a check valve, the liquid conveying pipe is communicated with a test tank through a check valve, a steel plate is suspended inside the test tank, and the upper end of the test tank is communicated with a vent valve. The test device with reasonable structure can accurately estimate relevant chemical medicaments inhibiting corrositivity of deleterious gases, is safe and highly efficient, and can meet requirements of quality test of oil wells resisting to inhibiters, such as H2S and the like.