Small-radius drainage ditch construction device

A small-radius drainage ditch construction device comprises a pouring formwork, the pouring formwork comprises a plurality of connecting plates and two formwork assemblies, each formwork assembly comprises an iron sheet formwork, a limiting steel bar, a reinforcing steel bar and a connecting plate, and the limiting steel bars and the reinforcing steel bars are located on the two sides of the iron sheet formwork correspondingly; therefore, the iron sheet formwork is fixed under the clamping action of the limiting steel bars and the reinforcing steel bars. The iron sheet formworks of the two sets of formwork assemblies extend in the trend of the ditch, a pouring space is formed between the iron sheet formworks of the two sets of formwork assemblies, and the lower ends of the reinforcing steel bars are embedded into the ground; the connecting plate is fixed between the two iron sheet templates, and the two ends of the connecting plate abut against the two iron sheet templates respectively. And the iron sheet tem