The invention relates to a window, in particular to a dual-purpose rotary heat-preservation three-proofing French window. The dual-purpose rotary heat-preservation three-proofing French window comprises rotating hinges, an upper frame and a lower frame, and the multiple rotating hinges are rotationally connected in the upper frame and the lower frame. A rotating shaft of each rotating hinge extends in the vertical direction or the horizontal direction. A protection net is arranged between every two adjacent rotating hinges. Each rotating hinge comprises a frame and two layers of glass installed in the frame, and a heat preservation cavity is formed between the two layers of glass. The dual-purpose rotary heat-preservation three-proofing French window can be closed rotationally and has good heat preservation, mosquito-proofing, rain-proofing, wind-proofing and lighting effects. The problem that an existing French window cannot integrate the rotary closing mode, a good heat preservation effect, a good three-proofing effect and a good lighting effect is solved.