The utility model provides a tower crane anti -climb safety device, including ground basement, protective unit and guard gate, the ground basement is circular, sets up around the tower crane standardfestival, the protective unit is rectangular frame structure, and including pole setting, horizontal pole, zinc -plating punch a hole net, U type support and iron sheet, the pole setting has two and set up the group leader's edges at rectangular frame structure, and the horizontal pole has two to be connected with the last lower end of pole setting respectively, and zinc -plating is punched a holeto net and is laid the lateral surface at rectangular frame structure, the welding of U type support sets up at long square frame bottom crossbar's lower terminal surface, open side down for U type support, and U type support joint sets up in the basement of ground, the iron sheet laminating sets up in rectangular frame structure lateral surface middle part and bottom, the guard gate is connectedwith the protective unit through the connecting piece. The utility model discloses stability is good, and the deformation can not rotated to atress or collision, and wire net intensity is big, and protecting effect is better, protects the rail after the construction is accomplished and can dismantle fast, save, transport and assemble.