Stirring tank with on-line catalyst adding device

The utility model discloses a stirring tank with an on-line catalyst adding device. The problem that an existing conventional stirring tank is not provided with an online adding device and is inconvenient to use is mainly solved. The device is characterized in that the tank body is further provided with a feeding bottle (4) used for installing a catalyst, the tank body is provided with a feeding pipe (11), the feeding bottle is installed on the feeding pipe, the feeding pipe is further provided with a valve (5) used for opening and closing the feeding pipe, the valve comprises a valve body (51) and a rotating shaft, the rotating shaft is provided with a valve element, and the valve element is connected with the valve body (51). The valve body is provided with a plurality of positioning grooves (511), the rotating shaft is provided with tips (521) matched with the positioning grooves, and the rotating shaft controls the valve element to open at different angles through matching of the tips and the different po