The invention provides a tree-like support device for an interbody fusion instrument. The device comprises a main body part and a support part; the main body part is shaped like a long strip; the support part is formed at at least one end of the main body part in the length direction of the main body part, and the support part comprises multiple pillars formed on the main body part by extending along the tree form from the main body part, one end of each pillar is fixed to the main body part, the other end of each pillar is provided with a supporting surface, and the supporting surfaces of allthe pillars are roughly coplanar. In this case, the long-strip-shaped main body part can support the fusion instrument through the pillars of the support part formed on the main body part, and the pillars can stably support the fusion instrument through the support face of one end of each pillar, and therefore the stability of the fusion instrument can be improved.