The invention discloses a foldable baby carriage. The foldable baby carriage comprises a front connection rod mechanism, a rear connection rod mechanism, a seat part, a seat cushion rod component, a backrest part and a backrest rod component, wherein the front connection rod mechanism comprises front legs; each front leg is provided with an upper end and a lower end provided with a front wheel device; the rear connection rod mechanism comprises rear legs; each rear leg is provided with an upper end and a lower end provided with a rear wheel device; the seat cushion rod component is used for supporting the seat part; and the backrest rod component is used for supporting the backrest part. When the foldable baby carriage is moved from an unfolded state to a folded state, the lower ends of the front legs and the lower ends of the rear legs move oppositely, so that the lower ends of the front legs and the lower ends of the rear legs approach each other until the distance between the lower ends of the front legs and the lower ends of the front legs is minimum, and at the time, the front wheel devices of the front legs and the rear wheel devices of the rear legs are folded to be in contact with each other or to be approximately in contact with each other. The foldable baby carriage is small in whole carriage size after being folded and convenient for carrying, and the foldable baby carriage can be well protected from contamination.