Linkage folding mechanism for baby stroller and baby stroller

The linkage folding mechanism comprises a frame front foot and a frame rear foot, and the upper ends of the frame front foot and the frame rear foot are connected to an overturning base at the same time. The electric bicycle further comprises a seat and is characterized in that the front portion of the seat is hinged to the upper portion of the front foot of the frame, the rear portion of the seat is connected with a bicycle folding mechanism, and the end of the bicycle folding mechanism is provided with a telescopic locking piece. A linkage piece is hinged between the middle rear portion of the seat and the upper portion of the rear foot of the stroller frame, a locking piece is arranged on the portion, close to the rear foot of the stroller frame, of the linkage piece, and when the stroller is in an unfolded state, the locking piece can be matched with the locking piece in a concave-convex mode to form locking. The frame front foot, the frame rear foot and the seat achieve one-step operation through the lin