Transmission device of high-frequency valve

The utility model provides a transmission device of a high-frequency valve, which comprises a connecting shaft, one end of the connecting shaft is provided with a spline and connected with a driving device, and the other end of the connecting shaft is provided with a square hole and connected with a valve body assembly; a cutting groove is formed in the other end of the connecting shaft and divides the square hole into two symmetrically arranged parts; fastening blocks are arranged on the two sides of the cutting groove; and the fastening block is locked and fixed through a fastener. And the spline connection has the characteristics of zero clearance and stable transmission, so that the problem that the valve cannot be opened due to small opening degree due to large clearance between the driving device and the connecting shaft in the opening and closing process of the conventional butterfly valve is solved. Through the arrangement of the cutting groove and the fastening piece, the fastening block is fixedly c