The invention provides a fuel gas plug valve. The fuel gas plug valve comprises a valve body (1) and a valve element (2), and an air inlet channel (11), an outer ring air outlet channel (13) and an inner ring air outlet channel (14) are formed in the valve body (1), wherein the air inlet channel (11), the outer ring air outlet channel (13) and the inner ring air outlet channel (14) communicate with a valve cavity; and the valve element (2) is rotatably arranged in the valve cavity of the valve body (1). The fuel gas plug valve is characterized in that a branched air channel (12) communicatingwith the valve cavity is further formed in the valve body (1), and the branched air channel (12) communicates with the inner ring air outlet channel (14); and a ventilating cavity (26) is formed in the middle of the valve element (2), an air inlet of the bottom of the ventilating cavity (26) communicates with the valve cavity, and an outer ring fire hole (21), an inner ring fire hole (22), a firestabilizing hole (23) and an air guiding groove (24) are formed in the side wall of the valve element (2). The fuel gas plug valve has the advantage of simultaneous linear adjustment of an inner ringand an outer ring, an adjusting angle of the valve element is small, the required angle is achieved within shorter time, and the requirement of burning loads is met.