Secondary filling model board trolley for channel center ditch, and use method for second filling model board trolley

The invention discloses a secondary filling model board trolley for a channel center ditch, and a use method for the second filling model board trolley, and belongs to the technical field of the secondary concrete filling construction of the channel center ditch. The model board trolley comprises a main bracket, four groups of lifting and lowering components and a model board component, wherein one end of the main bracket is provided with a driving walking component, and the other end is provided with a driven walking component; the upper ends of four groups of lifting and lowering componentsare in sliding connection with the main bracket, and the lower ends of four groups of lifting and lowering components are connected with the model board component; each group of lifting and lowering component is connected with the main bracket through a translation component; lower longitudinal beams are joist steel; and double-split joist steel in upper longitudinal beams and the lower longitudinal beams forms a structur