The utility model relates to an anti-falling device suitable for a power communication tower. The anti-falling device comprises a vacuum buckle, a safety buckle belt connecting piece arranged at the bottom end of the vacuum buckle in a rotating mode, a slide rod, a first slide rope and a second slide rope. A fixed piece for being fixed to a tower body is arranged on the slide rod. The two sides of the lower end of the slide rod are provided with a driving wheel and a driven wheel respectively. The side, close to the driving wheel, of the lower end of the slide rod is provided with a small pulley. Two U-shaped rings are fixedly arranged at the bottom of the vacuum buckle. One end of the first slide rope is fixed to the top of the vacuum buckle, and the other end of the first slide rope is sequentially connected to the driven wheel and the driving wheel in a sliding mode and buckled on the vacuum buckle. One end of the second slide rope is fixed to the front side face of the vacuum buckle, and the other end of the second slide rope slides by the small pulley and is buckled on the vacuum buckle. The anti-falling device is novel in design, reasonable in structure and easy and convenient to operate, allows installation personnel to move upwards, downwards, leftwards and rightwards, and ensures the personal safety of the installation personnel.