The utility model relates to a soiling bag vehicle, which comprises a support unit, an upper cover, a linkage unit and at least a buffer unit.The support unit comprises a base.A pair of support rods,One upper frame and most rollers,The upper cover may be closed to the upper frame.The linkage unit comprises a step frame and a pair of connecting rods.The trampoline has a pivot pivoted to the base and a pedal.The links are pivoted between the Treader and the upper cover,The buffer unit is pivoted between the base and the trampoline.When the trampoline is operated to the lower pressure position,The buffer unit can be connected by the trampoline and quickly stretched.And it can slowly retract and drive the pedal to return to a rising position.By using the setting of the buffer unit, not only the upper cover can be eased to rotate down the power channel, but also the human body can be prevented from being pinched and the noise can be reduced.一種污袋車，包含一支撐單元、一上蓋、一連動單元及至少一緩衝單元。該支撐單元包括一底座、一對支撐桿、一上框架及多數滾輪，該上蓋可蓋合於該上框架上，該連動單元包括一踩踏架及一對連桿，該踩踏架具有一樞接於該底座的樞軸及一踏板，該等連桿樞接於該踩踏架與該上蓋之間，該緩衝單元樞接於該底座與該踩踏架之間，當該踩踏架被操作至一下壓位置時，該緩衝單元可被該踩踏架連動而快速拉伸，且可緩慢回縮並帶動該踩踏架回復至一上升位置。利用該緩衝單元的設置，不僅可緩和該上蓋向下旋轉動力道，且可防止夾傷人體及減少噪音。
