Balanced regulating valve of self-sealing structure

The invention discloses a balanced regulating valve of a self-sealing structure. The regulating valve comprises a valve body. A padding base provided with a through hole is fixedly mounted in a padding base accommodating cavity. A valve rod is arranged in the padding base. A valve element block is mounted at the lower end of the valve rod. A padding accommodating cavity is formed in the outer wallof the padding base. Padding is accommodated in the padding accommodating cavity, and accordingly, the self-sealing structure is formed; and a transition cavity is formed between the padding and an inlet/outlet, a valve bush with the side wall provided with a window is mounted in the transition cavity, the valve element block is arranged in the valve bush and is in sealing fit with the valve bush, a through hole penetrating up and down is formed in the valve element block, the inlet/outlet can be closed when the valve element block moves to the bottommost end, and the inlet/outlet can be opened when the valve element