The utility model discloses an anti-collision beam structure for a car door. The anti-collision beam structure comprises a main transverse beam. The two ends of the main transverse beam are fixedly connected to a car door inner plate welding assembly. One longitudinal side or two longitudinal sides of the main transverse beam are provided with anti-collision beam branches. Included angles are formed between the anti-collision beam branches and the main transverse beam. According to the anti-collision beam structure for the car door, a car door anti-collision beam including one or more branch structures is adopted, the stamping technology is adopted on the anti-collision beam, the branch structures of the anti-collision beam can be obtained according to the performance conversion structure and position of a car door assembly, design flexibility is improved, the number of parts is reduced, and obvious advantages exist in both logistics and storage.