The invention discloses a method for applying a metal pipe to a metal vacuum tubular solar thermal collector adjustor, particularly, using an aluminum alloy tube as a main tube component of the adjustor. The method comprises the following procedures: selecting the aluminum alloy with tensile strength of 130-183MPa at 25 DEG C; adopting welding process to adjust a weld gap to be 0.05-0.15mm; adopting flame welding and controlling the welding temperature to be 420-480 DEG C; and anti-corroding. Solar station and water pipe joint connecting pieces communicated with the adjustor adopt aluminum alloy connecting pieces. The invention aims at applying the aluminum pipe to the metal vacuum tubular solar thermal collector adjustor, so as to reduce the cost of the adjustor, reduce the weight and promote the popularization of new energy.