The utility model relates to a marine solar energy lighthouse. The utility model has the technical scheme that the marine solar energy lighthouse comprises a base body; a lighthouse body is fixedly arranged on the base body; the lighthouse body is provided with an alternating current (AC) power supply device and a solar energy power generation device which are used for supplying power for the lighthouse in parallel; a controller is arranged between the AC power supply device and the solar energy power generation device and is used for controlling the switching between the solar energy power generation device and the AC power supply device; the base body comprises support pillars which are inserted and connected with support fixed piles into a whole by pouring, and the support fixed piles are fixed at the bottom of the sea; reinforcing plates are respectively arranged between the adjacent support pillars; an upper platform is fixed at the upper ends of the support pillars; the lighthouse body is arranged on the upper platform. The marine solar energy lighthouse has the beneficial effect that after the technical scheme is adopted, the energy is fully utilized by the existing mature solar power generation technology, so that the resource utilization rate is improved.