A trench forming device for a field, comprising a bottom plate and two side plates; the bottom plate has two long sides, and the two side plates respectively connect the two long sides of the bottom plate, wherein the bottom plate and the two side plates are integrally formed.一種用於田地的埂溝成型裝置,包括一底板及二側板;底板具有二長邊,二側板分別連接底板的二長邊 ,其中該底板與該二側板係以一體成型方式構成。