The invention discloses a multi-kettle reduced pressure corrosion simulation experiment device which comprises temperature controlled heaters, reaction kettles, condensers, a cooler, glass tubes, a buffer bottle and a vacuum pump, wherein each temperature controlled heater is of a barrel-shaped structure of which the upper end is open, and a thermal insulation layer is arranged on the inner wall of each heater; a magnetic stirrer is arranged at the bottom of each temperature controlled heater; the multiple reaction kettles are arranged in the temperature controlled heaters; a temperature controlled heater is arranged outside each reaction kettle; a condenser is correspondingly arranged at the upper end of each reaction kettle; the upper end of each condenser is connected to a glass tube; the middle of each glass bottle is coated inside the cooler; the upper openings of all the glass bottles are inserted into a lower cavity of the buffer bottle; and the top end of a round tube on the upper part of the buffer bottle is connected with the vacuum pump. According to the experiment device, results under multiple experiment conditions can be obtained in one experiment, the cost is saved, and the efficiency and stability of the device are greatly improved.