The utility model relates to an oil gas water multi-phase flow corrosion simulation test device which comprises a control cabinet, a gas liquid separator, an electric heater, a gas supercharger, a gas flowmeter, a screw pump, a liquid flowmeter, a static mixer, a corrosion detection probe, a rotatable joint, a corrosion detection pipe section, a corrosion coupon device and a corrosion reaction kettle, wherein a gas source pipeline is connected with an inlet pipeline of the gas supercharger and a gas outlet pipeline of the gas liquid separator in parallel; an outlet pipeline of the gas supercharger is connected with an inlet of the static mixer; a liquid source pipeline is connected with a liquid outlet pipeline of the gas liquid separator and an inlet pipeline of the screw pump in parallel; an outlet pipeline of the screw pump is horizontally connected with a static mixing inlet through the liquid flowmeter; a temperature sensor is arranged at a static mixing outlet; an outlet pipeline of the static mixer is connected with the corrosion reaction kettle through the corrosion detection pipe section; an outlet pipeline of the corrosion reaction kettle is connected with a gas liquid inlet of the gas liquid separator; and the corrosion detection probe is arranged in front of or behind the corrosion detection pipe section.