The invention discloses an anti-falling type branch trimming tool. The anti-falling type branch trimming tool is convenient to carry and use and can effectively improve operation safety without climbing through a long ladder. The anti-falling type branch trimming tool comprises a supporting rod, a fixed blade arranged at the upper end of the supporting rod, an installing plate arranged at the lower end of the supporting rod, a branch trimming limiting blade opening which is formed in the fixed blade and is downward, a rotatable blade, an arc-shaped guiding groove, a driving rod, a connecting shaft rod, a driving rod return spring, a rotating driving mechanism and a tree branch anti-falling structure, wherein the rotatable blade is rotatably arranged on the fixed blade through a rotating shaft rod, the arc-shaped guiding groove is formed in the fixed blade and is coaxial with the rotating shaft rod, the driving rod rotates around the rotating shaft rod, the rotatable blade and the driving rod are connected through the connecting shaft rod, the fixed blade and the driving rod are connected through the driving rod return spring, the rotating driving mechanism is used for driving the driving rod to rotate around the rotating shaft rod, and the tree branch anti-falling structure is arranged on the rotatable blade. The connecting shaft rod and the rotating shaft rod are parallel, andthe connecting shaft rod penetrates through the arc-shaped guiding groove.