The triangular crawler-type amphibious sand cleaning ship comprises a ship body and is characterized in that a
sediment storage bin is arranged on the rear portion of the ship body, a two-section type rear door plate is arranged on the rear portion of the
sediment storage bin, and the rear door plate is connected through a hinge to form an upper door plate and a lower door plate; the upper door plate can rotate backwards by a specific angle, serves as a
silt storage bin rear door when closed, serves as a balancing weight to enhance operation stability during
silt cleaning and excavating operation, and serves as a belt conveying mechanism supporting bottom plate when entering a dock to unload
silt. A triangular crawler-type walking mechanism is arranged at the bottom of the ship body and comprises a crawler belt, a driving gear and three driven gears, and the angle of a main shaft connected with the driving gear is adjustable so as to adapt to different
bank slope angles; the assorted dock adopts an amphibious structure, can be deployed on a dock close to the
shore or a smooth
shore in water, and is adapted to various scenes such as a reservoir hydro-fluctuation belt, a
shoal, a
bank slope and the like for operation.