The utility model belongs to the field of baby strollers, and particularly relates to a baby
carriage frame. The baby
carriage frame comprises a base, a frame front foot, a frame rear foot, a frame connecting
handrail and a seat, and is characterized in that the upper end of the frame front foot is rotationally hinged to the base, the upper end of the frame rear foot is fixedly connected to the base, and the lower end of the frame
handle is rotationally hinged to the base; a rear seat plate of the seat is connected to the base through a shaft or a shaft
assembly and can rotate relative to the base, and a transmission connecting rod mechanism used for achieving synchronous linkage folding of the frame front foot, the frame rear foot and the frame
handle is arranged among the frame front foot, the frame rear foot and the frame
handle. The relative position of the rear seat plate and the rear foot of the frame is changed by improving the connecting structure of the rear seat plate and the rear foot of the frame, and enough space is reserved for the folded backrest in the vertical direction, so that the length of the backrest is increased, and the comfort level is improved.