The invention discloses an unmanned solar energy fishery auxiliary triple-hulled vessel. The unmanned solar energy fishery auxiliary triple-hulled vessel comprises a left body, a right body and a small piece body located between the left body and the right body, and the small piece body is connected with the left body and the right body through a connecting bridge support; a deck is arranged on the connecting bridge support, and an upper layer building is arranged on the deck; electric transmission devices are arranged below the left body and the right body respectively, a water quality detecting device is arranged in the upper layer building, multiple solar panels are laid on the deck and connected with a solar storage battery, and an automatic feed putting system is arranged at the tail of the deck and connected with a control system. The unmanned solar energy fishery auxiliary triple-hulled vessel can reach an aquiculture region stably and flexibly to carry out patrol, monitor the water quality, provide oxygen content of the water area in real time and carry out oxygenation and pH value and water turbidity detection.