The invention relates to a gate box buried pipe type drainage port structure for dredging engineering. The drainage port structure comprises a geotechnical cloth layer arranged on the ground, a bottomconcrete layer is arranged on the geotechnical cloth layer, a plurality of drainage main pipelines are arranged on the bottom concrete layer in parallel, each drainage main pipeline is composed of aninner pipeline body, an outer pipeline body and a plurality of middle pipeline bodies located between the inner pipeline body and the outer pipeline body, a common gate box is arranged at the end parts of the inner pipeline bodies, a gate valve is arranged at the end part of each outer pipeline body, an outlet of each gate valve is connected with a drainage pipeline in a butt joint mode, the gatebox comprises a gate box plate and a gate box truss which is fixedly arranged on the outer side of the gate box plate, a surrounding bank body is arranged at the upper portions of the drainage main pipelines and on the outer side of the gate box plate, a top concrete layer is arranged on a surrounding bank top of the surrounding bank body, a masonry layer is laid on the surface of a surrounding bank backwater side of the surrounding bank body, and a backwater side concrete layer is arranged on the outer side of the masonry layer. According to the drainage port structure, the structure is simple, the construction is easy, the structural strength is high, the combination degree is high, and the leakage is not liable to occur.