The invention discloses a parallel test device for a gas liquid reaction. The parallel test device comprises a tank body, a tank cover, spacing sheets and a lower barrel, wherein the upper 2/3 space from the bottom surface of the tank body is longitudinally divided into more than two same compartments by the spacing sheets; a concave surface is formed in the middle of the bottom of each compartment; a gas hole, a gas pressure meter and a sampling hole are formed in the tank cover; pipe sleeves are arranged at intersections of the spacing sheets; an opening is formed in the upper side of each pipe sleeve; a cylindrical lampshade is arranged under the tank cover; a lamp is arranged in the lampshade; when the tank cover covers the tank body, the lampshade is inserted into the pipe sleeves; a heating plate is arranged on the upper bottom surface of the lower barrel; a magnetic stirrer is arranged in the lower barrel. The upper space in the tank body is communicated, the reaction is carried out in the same gas environment and thus the conduct of the parallel test is benefited.