A foldable support bracket is provided and comprises a foot stand assembly (10), a telescoping rod assembly (20) and a support assembly (30); the telescoping rod assembly (20) has a first end and a second end opposite to each other, wherein the foot stand assembly (10) is provided on the first end of the telescoping rod assembly (20); the support assembly (30) is provided on the second end of the telescoping rod assembly in a collapsible manner, wherein the support assembly (30) has a deployed state and a collapsed state; wherein, the support assembly (30) comprises at least a main support member (31), a first linkage component (32) and a second linkage component (33); wherein, in the deployed state, the first linkage component (32) and the second linkage component (33) are unfolded to form a support surface; wherein, in the collapsed state, the first linkage component (32) and the second linkage component (33) are respectively attached along the main support member (31) to form a rod-like structure. The structure of the foldable support bracket improves the support stability, and also achieves foldable collapsing and deploying, which is convenient to carry and use, and also facilitates manufacturers' packaging and transporting.