The utility model discloses an automobile carburetor. The carburetor comprises a carburetor body and a float chamber, wherein an air inlet is formed in one end of the carburetor body; wherein the upper end of the carburetor body is fixedly connected with a box body; a through groove is formed in the lower end of the box body; the through groove is communicated with one end of the air inlet; the side surface of the upper end of the box body is fixedly connected with a hinge seat; the hinge seat is hinged with a cover plate; a placing groove is formed in the lower end surface of the interior ofthe box body; an air filter is connected into the placement groove in a sliding manner; first grooves are formed in the two sides of the lower end face of the box body, bearings are fixedly connectedto the lower end faces of the first grooves, rotating shafts are fixedly connected to the interiors of the bearings, clamping blocks are fixedly connected to the side faces of the rotating shafts, arc-shaped sliding grooves are formed in the side faces of the first grooves, and the clamping blocks are slidably connected to the interiors of the arc-shaped sliding grooves. According to the automobile carburetor, the air filter can be fixed, displacement is avoided, and the filtering effect is improved.