The invention discloses an on-line air valve pulling device which is mainly composed of a synchronous belt pulley (A1), a dynamic synchronous belt pulley (2), a synchronous belt (3), a synchronous belt pulley (B4), a rack (5), a base (6), a linear guide rail (7) and the like, wherein an air cylinder seat (25) is fixedly arranged on the side surface of the rack (5), an air cylinder (27) is fixedly arranged on the rack (5) through an air cylinder flange (26) and the air cylinder seat (25), an output rod of the air cylinder (27) is connected with an air cylinder connecting plate (24), the base (6) is fixedly arranged on the rack (5), the linear guide rail (7) is installed on the base (6), and the linear guide rail (7) and a connecting plate (9) are connected through a guide rail sliding seat (8). When the on-line air valve pulling device is used, the on-line air valve pulling requirement on wheels can be satisfied, and the on-line air valve pulling device has the advantages of ideal effect, high efficiency, safety and reliability in operation and high degree of automation and is especially suitable for mass production on production lines.