Self-sealing setting ball seat

The utility model relates to the manufacturing technique field of underground packer tool of petroleum and gas industry. The utility model adopts the double-sided plugging design, provides a self-sealing setting ball seat which can realize the double-sided (forward and reverse) plugging of underground packer pipe column, and comprises a self-sealing mechanism and a shell mechanism. A self-sealing pipe of the self-sealing mechanism is arranged in the self-sealing jacket; four side holes are distributed in corresponding positions of self-sealing pipe and self-sealing jacket; a shell body of the shell mechanism is connected with a joint through screw threads. The self-sealing setting ball seat resolves the problem of forward plugging only in the prior art, and has the characteristics of realizing forward and reverse plugging in construction in high-pressure petroleum and gas well.