Generally, an existing child's tricycle includes a front fork, a front wheel arranged at a lower part of the front fork, a handlebar arranged on the front fork and being capable of controlling a steering of the front wheel, a frame body extending in a front-rear direction, a seat arranged on the frame body, rear brackets respectively arranged on two sides of the frame body, and rear wheels respectively arranged on the corresponding rear brackets. However, the frame body of an existing child's tricycle is generally fixed together with a frame head tube which is sleeved on the outside of the handle bar, in such a way that the bracket can not be folded, and can only be presented in a riding state. When the tricycle is carried in outgoing, needs to be deposited or transported, it is inconvenient since the volume of the tricycle is too large, and the cost is high during the transportation.