The present invention relates to a fruit tree length adjustment type support fixture. The present invention relates to a length adjustment type support fixture for preventing the fruits from being deformed or preventing branches of the fruit tree from being sagged under the weight of fruit tree while fruits are being grown up during harvest time, particularly for preventing the branches of the fruit tree from being swayed or broken due to wind and rain. More specifically, the present invention relates to a support fixture for preventing sagging and swaying of fruit tree branches, the support fixture including a support which is installed at the support fixture to support a branch, an adjustment device which is installed at the support fixture to adjust length of the support fixture, a fixing band which ties and fixes branches and branches to the support fixture, and others. A support fixture for preventing sagging and swaying of fruit tree branches according to the present invention is capable of protecting trees and fruits even in case of strong winds or high winds and rain since the support fixture is capable of selectively adjusting a length of the support fixture according to a distance between the branches, is capable of solidly fixing the branches with a fixing band irrespective of thickness of the branches, pulls up branches that are sagged down, and holding the branches each other. Further, a support fixture for preventing sagging and swaying of fruit tree branches according to the present invention has effects that the support fixture not only protects fruit trees and fruits, but also contributes to income increases of fruit farms by including an ogee supporting groove which enables the support fixture to be easily detached from the ogee supporting groove or attached to the ogee supporting groove, and enables the support fixture to be closely adhered to branches as needed, and which enables the support fixture to be installed such that the tree and the supp