Anti-crystallization ball valve

The anti-crystallization type ball valve comprises a valve body, an inflow channel and an outflow channel, the inflow channel and the outflow channel are arranged on the valve body in a bilateral symmetry mode, a valve deck is arranged at the top of the valve body, a valve seat is arranged on the portion, on the inflow channel side, of the valve body, a ball is arranged in the valve body, and a circulation channel is formed in the ball. The ball abuts against the valve seat to form an annular sealing face, a valve rod is arranged on the top of the valve deck in a penetrating mode and penetrates through the valve deck to be connected with the ball, and the outer diameter of the connecting pipe is the same as the inner diameter of the inflow channel. Two limiting assemblies are symmetrically arranged at the positions, corresponding to the inflow channel, of the valve body up and down, the limiting assemblies play a role in limiting the connecting pipe, an annular groove is formed in the inner side wall of the i