The invention provides a bogie frame of a motor car. The frame comprises two side beams of a box type structure and two cross beams fixed to the two side beams. The cross beams are of a hollow structure. A longitudinal beam is fixed between the inner sides of the two cross beams. The two ends of each side beam are fixedly provided with brake hanging brackets. The brake hanging brackets and upper cover plates of the side beams form the closed box type structure. According to the bogie frame of the motor car, the structure is simple, the requirement for the low weight of the car body can be met on the premise of ensuring the frame strength, and meanwhile three-point hanging installation of a brake clamp is achieved.