Ceramic heating tube capable of accurately controlling temperature

The utility model relates to a ceramic heating tube capable of accurately controlling temperature in the field of ceramic heating tubes, one end of a tube body far away from an electrode lead is provided with a first clamping block, the first clamping block penetrates through the tube body, the tube body is fixedly connected with the first clamping block, the side of the tube body close to the first clamping block is provided with a second clamping block, and the second clamping block is fixedly connected with the first clamping block. A connecting column is connected between the second clamping block and the first clamping block, the connecting column is fixedly connected with the second clamping block, the end, close to the second clamping block, of the connecting column penetrates through the second clamping block, a fixing block is arranged at the end, penetrating through the second clamping block, of the connecting column, the fixing block is fixedly connected with the connecting column, and a spring is