RTO gas switching valve

The utility model relates to the technical field of waste gas environment-friendly treatment equipment, in particular to an RTO gas switching valve which comprises a shell, a treatment cavity, a communicating pipe, a gas cavity, a sealing valve plate and an air cylinder. A treatment cavity, a communicating pipe and a gas cavity are arranged in the shell; two ends of the communicating pipe are respectively communicated with the processing cavity and the gas cavity; the sealing valve plate is arranged in the processing cavity; the air cylinder is arranged on the shell, connected with the sealing valve plate and used for driving the sealing valve plate to block the communicating pipe; a groove is formed in one end, close to the treatment cavity, of the communicating pipe, and a sealing strip is arranged in the groove; the gas tightness design is carried out at the communicating pipe, so that the gas tightness of the treatment cavity is enhanced, the leakage of organic waste gas is avoided, the sealing performanc