The invention of claim 1 is provided to the elevating unit, a first oil chamber 1 through the piston (110) being divided into a first oil chamber (A) and the second oil chamber (B), through the hydraulic fluid inlet 170 ( a) the first double-acting cylinder (100 in which a fluid is the first piston 110. the first piston rod (120 coupled to the first piston 110 is moved), the height as the inlet), the second lifting unit is provided, the second oil chamber, a second oil chamber in accordance with the movement of the pressure chamber (C) and the air chamber (D), the first piston 110, second is divided through the second piston 210, as connected to (B) doedoe second fluid loaded in (B) is introduced into the pressure chamber (C) is introduced to the second oil chamber, the amount of inlet fluid flow into the residual amount of fluid and the pressure chamber (C) in the same manner of (B), the pressure chamber ( first as the second fluid flows in C), second piston 210 is moved coupled to the second piston 210. the second piston rod 220 are single-acting are stretched to the same length as that of the first piston rod (120) cylinder 200 and the first oil chamber (a) a first oil chamber and the hydraulic pump 300 for introducing a fluid, is coupled to the first piston (110) (a) and the second oil chamber to the (B ) for connection, and the first piston 110 is double-acting cylinder (if it is located in the bottom surface 100) of the first hydraulic fluid that is open flows through the internal flow path 113 of the first piston 110, second oil chamber flows into (B), is closed when spaced from the bottom surface relates to the second oil chamber (B) to the hydraulic lifting cylinder for a vehicle comprising a tuning adjustment valve 400 is blocked from entering the tuning device.