The utility model relates to a working station of solar-energy heating system. A tube A, a tube B and an exhaust composite tube under the tube A are arranged in a shell; the composite tube consist of an outer pipe, a diversion duct arranged inside the outer tube and a connection joint of the outer pipe and the diversion duct; a sandwich layer is formed between the outer tube and the diversion duct; the composite tube is provided with an exhaust valve connected with the sandwich layer; the tube A is communicated with the diversion duct of the composite tube and connected with a three-way change valve that is connected with a pressure safety valve through a connection tube; the tube B is also connected with a three-way change valve that is connected with a feeding valve; a circulation pump is connected with the middle part of the tube B. When air goes through the composite tube, the air in medium can be separated out and stored in the sandwich layer, then can be exhausted out only by open the exhaust valve. The adding of circulation medium of the utility model is divided into upper tube addition and lower tube addition; during the circulation medium adding process, the air is drained out by the exhaust valve, and the air exhaust process stops when the circulation medium adding process finishes.