The invention relates to a high-performance non-leakage ball valve for natural gas transmission. The high-performance non-leakage ball valve for the natural gas transmission comprises a support and a valve body arranged on the support, wherein a valve rod is arranged on the top of the valve body, a ball is arranged inside the valve body, the two ends of the ball are connected with the valve body in a sealed mode through a valve base, a sealing ring is arranged between the valve base and the ball, the cross section of the sealing ring is triangular, three vertex angles of the triangular cross section of the sealing ring are fillets with the equal radius, an annular groove matched with the sealing ring is formed in the valve base, and the vertex angles of the triangular cross section of the sealing ring are in interference fit with the ball. The high-performance non-leakage ball valve for the natural gas transmission enables original surface contact sealing to become line contact sealing by adopting the sealing ring with the triangular cross section, not only can the intensity of pressure between the sealing ring and the ball and the sealing effect be improved, but also the phenomenon that due to the fact that impurities are mixed up between the sealing ring and the ball, the sealing effect is affected can be effectively avoided.