Soft-seal valve element of valve

The invention relates to a soft-seal valve element of a valve. The soft-seal valve element comprises a connecting tube. The top of the connecting tube is sleeved with a threaded column. A handle is integrally formed at the top of the threaded column. Supports are arranged on the two sides of the connecting tube respectively. A bolt is arranged at one end of each support. The interior of the connecting tube is of a hollow structure. Sliding grooves and threaded grooves are formed in the inner wall of the connecting tube. The threaded grooves are formed above the sliding grooves. A stretchable rod is sleeved with the bottom of the connecting tube. The connecting tube is movably connected with a valve element body through the stretchable rod. According to the soft-seal valve element, as the threaded grooves and the sliding grooves are formed in the inner wall of the connecting tube, the effect of converting rotating pressing into sliding pressing is achieved; as a buffering air bag is arranged, the effect of protecting the stretchable rod and the valve element body is achieved; as an air bag layer is arranged, the effect that the valve element body is pressed to achieve better sealing is achieved; and as an air pressure guide rod and a piston are arranged, the effect of pressing the air bag layer is achieved.