The invention discloses a flexible solar cell, which sequentially comprises a flexible substrate, a reflective metal layer, multiple photoactive layers, a transparent conductive layer and a metal mesh from the bottom surface to the top surface, wherein the reflective metal layer is used for reflecting incident light to improve the light energy absorption rate of the flexible solar cell, and meanwhile, the reflective metal layer serves as a cathode of the flexible solar cell; the multiple photoactive layers are used for converting light energy into a current carrier and further converting the current carrier into electric energy; the transparent conductive layer is used for serving as an anode of the flexible solar cell; and the metal mesh is used for collecting charges of the transparent conductive layer to enhance the conductivity of the transparent conductive layer. According to the flexible solar cell provided by the invention, the structure of the flexible solar cell in the prior art is optimized; and the technical problems that the prepared large-area flexible solar cell is low in yield and poor in photoelectric conversion efficiency are solved.