Highly abrasion-proof ball valve

The utility model discloses a highly abrasion-proof ball valve. The highly abrasion-proof ball valve comprises a valve body, a ball, a valve seat, a valve rod and a handle, wherein the ball is mounted in the valve body; the valve body comprises an inlet and an outlet; the ball is provided with a channel which penetrates through the ball from the center of the ball; the inlet and the outlet both are connected with the channel of the ball; the valve seat is mounted at the opening of the channel of the ball; a second valve seat fitted with the external spherical surface of the ball is arranged at the outer circle of the ball; the second valve seat is arranged perpendicularly to the channel; the second valve seat is composed of at least two valve seat blocks abutted with each other; sliding grooves allowing the valve seat blocks to slide are formed on the other sides, relative to the ball, of the valve seat blocks; the valve seat blocks are arranged in close fit with the sliding groove; a butterfly spring is arranged between each valve seat block and the bottom of the corresponding sliding groove in a propping manner; a plurality of grooves are further formed in the bottom of each sliding groove and compression springs are arranged in the grooves; one sides, relative to the grooves, of the butterfly springs are in close fit with the openings of the grooves and the compression springs are pressed into the grooves. The highly abrasion-proof ball valve has the advantages of abrasion resistance, high sealing property and leakage prevention.