A tree support assembly for fixing a soil ball at a root of a tree to a planting hole. The tree support assembly comprises a plurality of cover plates and a plurality of fixing members, and the plurality of cover plates are located on the soil ball, and each cover plate has a combined edge and a number of The cover plates are spliced to each other and form a gap between each of the joint edges for the passage of the trees, and the fixing members are connected to the cover plate and the inner wall surface of the planting hole so that the cover plates fix the soil ball to the planting hole.一種樹木支持組件,用以將樹木根部之土球固定至植穴,樹木支持組件包含數個蓋板以及數個固定件,數個蓋板位於土球上,各蓋板具有一結合邊,數個蓋板係相互拚接並在各該結合邊之間形成一空隙以供樹木通過,各固定件係連接一該蓋板以及植穴之內壁面進而使該等蓋板將土球固定於植穴。