The invention discloses a foldable tricycle for children and a folding method of the foldable tricycle. The foldable tricycle for children comprises a frame and a handlebar arranged in the front of the frame, wherein the frame comprises a head tube arranged on the handlebar in a sleeving manner, an upper connecting rod assembly rotationally connected onto the head tube, a lower connecting rod assembly rotationally connected onto the head tube, a push rod assembly connected in the rear of the upper connecting rod assembly and the lower connecting rod assembly and a support rod which is rotationally connected between the upper connecting rod assembly and the lower connecting rod assembly and located in front of the push rod assembly, and the upper connecting rod assembly, the head tube, the lower connecting rod assembly and the support rod form a four-bar link mechanism; the push rod assembly is rotationally connected with the upper connecting rod assembly and is fixedly connected with or separated from the lower connecting rod assembly through a locking device; during folding, the locking device is unlocked firstly, then the push rod assembly is lifted upwards to be separated from the lower connecting rod assembly and overturned forwards, so that the push rod assembly, the handlebar, the upper connecting rod assembly and the lower connecting rod assembly are stacked sequentially from top to bottom, and size is small after folding.