A kind of removable power assist apparatus of wheelchair, the wheelchair include a frame body, two front-wheels and two Hous wheel, which includes an auxiliary connection unit and a carrier unit. The auxiliary connection unit is arranged on the what wheelchair, and including a terminal pad and plural gripper jaw. The carrier unit includes a main frame body, the extension frame body and a gearing mould group with a tommy bar for being pivoted the what main frame body. The extension frame body can be made to pivot with respect between one link position of main frame body what and a releasing position by pulling the tommy bar, in the link position, the extension frame body fixes the what terminal pad, and by the gearing mould group contact on the main frame body, thereby the grade front-wheels of the wheelchair can be lifted away from ground, at the releasing position, the terminal pad removal of the extension frame body from the auxiliary connection unit.一種輪椅之可拆式動力輔助裝置，該輪椅包括一架體、二前輪及二後輪，該可拆式動力輔助裝置包含一輔助連接單元，及一支架單元。該輔助連接單元設置於該輪椅上，並包括一連接盤及複數夾持爪。該支架單元包括一主架體、一樞設於該主架體的延伸架體，及一具有一扳桿的連動模組。藉由扳動該扳桿能使該延伸架體相對該主架體於一連接位置及一釋放位置之間樞轉，在該連接位置時，該延伸架體固定於該連接盤，且藉由該連動模組頂抵在該主架體上，藉此能將該輪椅的該等前輪抬升遠離地面，在該釋放位置時，該延伸架體自該輔助連接單元的該連接盤卸除。
