The utility model discloses a light collecting solar energy fresh water extraction element, include an automatic light formula solar energy collection device that follows, automatic support frame of following light formula solar energy collection device to include the bottom, the upper end of support frame is fixed and is equipped with the pot body, and pot body is fixed the support that is equipped with through its top and is equipped with the thermal -arrest water tank, and the thermal -arrest water tank passes through the magnetic drive pump and links to each other with the hollow fiber membrane subassembly, a hollow fiber membrane subassembly and a water installation link to each other, go out the water installation and include the condenser pipe of being connected with the hollow fiber membrane subassembly and comply with the water ring vacuum pump who is connected with the condenser pipe, are equipped with the product basin between condenser pipe and the water ring vacuum pump. The beneficial effect of the utility model: the utility model discloses usable solar energy purifies sea water, bitter and muddy water etc. Has realized the high -efficient cyclic utilization of solar energy and water resource.