The invention discloses a barospirator extension tube which is composed of a clamping sleeve, a clamping sleeve nut, a quick tube connector, a rubber mat, a nut, a stainless steel bellows, a steel pipe, a connecting bolt, angle iron, a U-shaped bolt, a flange and a transformer silica gel respirator. A transformer conservator and an exhaust steel pipe are connected to be a whole, the exhaust steel pipe is inserted into the quick tube connector, the clamping sleeve clamps the exhaust steel pipe by rotating the clamping sleeve nut, the lower portion of the quick tube connector is connected with the stainless steel bellows through the nut, and the lower end of the steel pipe is fixedly connected with the flange. The middle of the steel pipe is connected with the angle iron through the U-shaped bolt, and the steel pipe is connected with the transformer silica gel respirator through the connecting bolt. The barospirator extension tube is convenient to install and transform on the working site, and the quick tube connector is connected with the stainless steel bellows. After the transformation, when the transformer silica gel respirator is replaced, workers do not need to perform power cut or ascend a height, and constructors' safety is guaranteed.