Tree growth cone for big ancient trees

The invention discloses a tree growth cone for a big ancient tree. The tree growth cone comprises a cone body, an inner rod and an outer rod, the cone is detachably connected with the inner rod, and the inner rod is detachably connected with the outer rod; a supporting part is arranged at the tail end of the outer rod. When the tree growth cone is used for drilling a wood core of a tree, pressure can be applied through the chest, meanwhile, the hand rocker is used for shaking, the hand rocker is driven by the gear set, the growth cone can be made to rotate, and therefore stable drilling is achieved; when the cone body is drilled into a tree body, the sampling groove is inserted into the growth cone through the sampling groove control rod, and at the moment, the sampling groove is pulled back through the sampling groove control rod, and then a tree core sample can be taken out. According to the invention, the problems of instability, easiness in shaking, breaking of an obtained sample and the like due to the f