Well washing group valve device with low starting pressure

The utility model discloses a low-starting-pressure well washing group valve device which comprises a valve body, the upper end of the valve body is in threaded connection with a limiting connector, a hollow columnar sliding sleeve core is arranged in the valve body in a sleeved mode, the valve body and the sliding sleeve core are fixedly connected through a shear pin, an upper end opening of the sliding sleeve core is an inner conical sealing face, and the upper end opening abuts against a secondary overflowing sleeve. A floating ball seat capable of sliding up and down is sleeved in the secondary overflowing sleeve, a gap for liquid circulation is reserved between the floating ball seat and the secondary overflowing sleeve, a round through hole is formed in the bottom of the floating ball seat, a sealing ball is arranged on the upper portion of the floating ball seat, the diameter of the sealing ball is larger than that of the through hole in the floating ball seat, and the sealing ball can be set at the up