Quantitative tobacco root irrigation device

The utility model belongs to the technical field of agricultural fertilization and pesticide application, and particularly relates to a tobacco quantitative root irrigation device, a root irrigation mechanism is communicated with a liquid storage tank through a first connecting rod, the root irrigation mechanism comprises a liquid medicine barrel, a liquid inlet pipe is arranged on the liquid medicine barrel, and a quantitative assembly is connected in the liquid medicine barrel in a sliding mode; the quantifying assembly comprises a bottom plate, a first connecting rod and a top plate, the bottom plate is fixed to the bottom of the first connecting rod, the top plate is installed on the first connecting rod, and a sealing plate is arranged on the side, facing the liquid inlet pipe, of the bottom of the bottom plate; a first limiting block is fixedly connected into the liquid medicine cylinder; a liquid outlet channel is formed in the bottom plate, a blocking assembly is arranged in the liquid medicine barrel