The invention discloses a lens water tank type solar-powered seawater desalination support vessel. The support vessel comprises a vessel body, a vessel body deck is fixed to the middle of the vessel body, a condensation chamber partition plate and an evaporation chamber partition plate are fixed between the vessel body deck and the vessel body, a condensation chamber and an evaporation chamber are obtained through partition, the condensation chamber is located at the left side of the evaporation chamber, a condensation pipe is fixed into the condensation chamber, a filter is arranged on the outer side face of the vessel body, the lower end of the condensation pipe is connected with the filter, the upper end of the condensation pipe is connected with a seawater pump, an air outlet pipe is arranged at the upper left position of the condensation chamber through the deck, a water outlet pipe of the seawater pump is communicated with a lens water tank, the right end of the lens water tank is communicated with a spray pipe inside the evaporation chamber through a heat gathering pipe, multiple nozzles are mounted on the spray pipe, the condensation chamber is communicated with the evaporation chamber through a channel, and an induced draft fan is arranged in the channel; solar cell panels and air cylinders are arranged at the vessel edges at the two sides of the vessel body. The lens water tank type solar-powered seawater desalination support vessel is small in occupied land and low in cost.