Multifunctional touch type double-cylinder continuous dosing and filtering device

The utility model relates to the technical field of continuous under-pressure closed dosing at a wellhead of a rod-pumped well. The main function of the device is the technical field of dosing, and particularly relates to a multifunctional touch type double-cylinder continuous dosing filtering device. Comprising a dosing pump and a filter pump which are arranged on a polish rod sealer, the dosing pump and the filter pump are arranged in the same shell, each of the dosing pump and the filter pump comprises a working barrel and a piston rod arranged in the working barrel, the piston rod is located under a polish rod clamp, an adjusting cap is arranged at the top end of the piston rod, and the adjusting cap is connected with the dosing pump. A spring is arranged on the outer side of the piston rod and located between the bottom of the adjusting cap and the top of the working barrel. Wherein one working barrel is connected with the buffer tank and the oil storage tank through a three-way valve, the other working