The present invention provides a wood post standing wire control device which enables the tree to be fixed in a state that growth of the tree is not hindered while automatically or manually controlling tension of a standing wire according to growth of a tree. To this end, the wood post standing wire control device of the present invention includes: a main body case which is fixed to a wood post； an automatic pressing pin which is installed a front upper end of the main body case and carries out an operation of being pushed out in a process of growing the tree in a state that the automatic pressing pin is in contact with the outer surface of the tree； an operating slider which is positioned within the main body case and is moved in a backward direction according to an operation of pushing the automatic pressing pin in a state that the operating slider comes into contact with the automatic pressing pin； an automatic spring which is installed between a rear upper end of the operating slider and a rear upper end of the main body case, and elastically supports a backward movement of the operating slider； saw-toothed wheels which are shaft-coupled in a state that the saw-toothed wheels are positioned in both sides of the operating slider with the operating slider being disposed therebetween, and to one surface of which both ends of the standing wire wound around the outer surface of the tree are each bound； and gear teeth which are formed on outer surfaces of the saw-toothed wheels, and of which locking is selectively released according to forward and backward movements of the operating slider in a state that the gear teeth are locked in locking grooves formed in both sides of the operating slider to carry out an unwinding operation or an unwinding release operation of the standing wire wound around the saw-toothed wheels by conducting a restriction operation or a restriction release operation of the saw-toothed wheels.본 발명은 나무의 성장에 따라 고정줄의 장력을 자동 및 수동으로 조절해가며 나무의 성장을 방해하
