Folding mechanism for baby stroller

The invention discloses a folding mechanism for a baby stroller. The folding mechanism comprises a push rod assembly, a front foot tube assembly, a rear foot tube assembly and a foundation assembly; the rear end of a bottom coil is rotationally connected to the lower ends of rear foot tubes, and the upper ends of the rear foot tubes are rotationally connected to upper ends of front foot tubes; a rear support plastic part with the middle capable of being folded, a pair of cross pipes crosswise rotationally connected and a pair of pull rods are additionally arranged, the two ends of the rear support plastic part are rotationally connected to the lower ends of the rear foot tubes on the left side and the right side respectively, and the two ends of the two cross pipes are rotationally connected to the upper end of rear foot tube on one side and the end, close to the rear foot tube, of the bottom coil on the other side; the front end and the rear end of the pair of the pull rods are rotationally connected to the