Online liquid feeding device suitable for reconstituted tobacco auxiliaries

The online liquid feeding device comprises a 1 # liquid feeding tank and a 2 # liquid feeding tank, a 1 # three-way switching valve and a 2 # three-way switching valve are arranged at the outlet end of the 1 # liquid feeding tank and the outlet end of the 2 # liquid feeding tank respectively, and an outlet of the 1 # three-way switching valve is connected with an inlet of a 3 # three-way switching valve through a 1 # feeding pipe. An outlet of the 2 # three-way switching valve is connected with an inlet of the 3 # three-way switching valve through a 1 # feeding pipe, a 1 # variable frequency pump and a 1 # automatic valve are arranged on the 1 # feeding pipe, a 2 # variable frequency pump and a 2 # automatic valve are arranged on the 2 # feeding pipe, two outlet ends of the 3 # three-way switching valve are respectively connected with a 1 # filter and a 2 # filter, and outlet ends of the 1 # filter and the 2 # filter are respectively connected to a discharging pipe. According to the utility model, the work of