The invention discloses a portable gasoline engine. According to the technical scheme, the portable gasoline engine is characterized by comprising an installation frame and a body, wherein the body islocated in the installation frame, the end face, making contact with the ground, of the installation frame is a placement face, the two opposite side walls of the installation frame are both fixedlyconnected with extending blocks, the end faces of the sides, close to the placement face, of the extending blocks are first inclined planes, the first inclined planes are evenly provided with at leasttwo sliding grooves, the sliding grooves are internally connected with rolling pieces in a sliding manner, the installation frame is provided with a drive piece, and the output end of the drive pieceextends into the installation frame and is connected with the rolling piece; and when the gasoline engine needs to be moved, an installation base is controlled only through the drive piece to move, rolling wheels on the installation base make contact with the ground, the installation frame is separated from the ground, and then the gasoline engine can be conveniently controlled to move. In the using process, the interior of the body is coated with lubricating grease so that the loss of energy can be reduced, and the gasoline engine saves more energy.