A variable tree protection plate is introduced. To this end, the present invention provides a first horizontal frame and a second horizontal frame having guide grooves of a predetermined length on both sides of the inner side, and both sides of the first horizontal frame and the second horizontal frame so that they can slide while being fitted along the respective guide grooves. A first extension frame and a second extension frame located on each of both sides of the horizontal frame and connected through separate fastening means； Each of the third and fourth horizontal frames having guide grooves of a predetermined length on both sides of the inner side, and both sides of the third horizontal frame and both sides of the fourth horizontal frame so that they can slide while being fitted along the respective guide grooves. A third extension frame and a fourth extension frame located at, but connected through separate fastening means； The first and second vertical frames each having guide grooves of a predetermined length on both sides of the inside, and both sides of the first vertical frame and both sides of the second vertical frame so that they can slide while being fitted along the respective guide grooves. It is located at, but includes a first vertical extension frame and a second vertical extension frame connected through separate fastening means, one side of the first vertical extension frame and one side of the first extension frame through a separate fastening means It is connected, and one side of the second vertical extension frame is connected to one side of the third extension frame through a total of separate fastening means, and a third vertical frame and a third vertical frame each having a guide groove having a predetermined length on both sides thereof are formed. 4 Vertical frame and a third vertical extension frame that is located on both sides of the third vertical frame and on both sides of the fourth vertical frame so that it can slide while be
