Retractable baby cart frame

The utility model relates to a retractable baby cart frame which is connected to a front wheel and two rear wheels and changes between a folding state and a using state. The utility model comprises a bottom support unit, a front support unit, a rear support unit and a handle unit, wherein the bottom support unit comprises a front wheel support and two bottom pipes which are provided with a front end part and a rear end part and form a V shape; the front end parts of the two bottom pipes are connected with the front wheel through the front wheel support, and the rear end part of each bottom pipe is connected with the rear wheels; the front support unit comprises two front support pipes respectively provided with an upper end part and a lower end part, and the lower end part of each front support pipe is respectively pivoted with the bottom pipes; the rear support unit comprises two rear support pipes respectively provided with an upper end part and a lower end part, and the lower end part of each rear support pipe is respectively and correspondingly in pivoting connection with the bottom pipe; the handle unit comprises two straight pipes and a crossing pipe, and the two straight pipes are connected through the crossing pipe; one end of each straight pipe is respectively in pivoting connection with the upper end part of the front support pipe.