In biology, chemistry and other related technical fields, materials with a diameter of less than 1 micron and a high length-diameter ratio are commonly referred to as nanofibers. The importance of nanofiber structure is that it can be used as one-dimensional linear material or two-dimensional planar material. The former can load one-dimensional nanoparticles and nano-microspheres to construct functional membrane materials, the latter can be compounded to form the building block of three-dimensional structure. At present, the methods of preparing nanofibers include electrospinning, template method, phase separation, self-assembly, island extrusion, etc. Among them, electrospinning technology has become the main method to obtain nanofibers because of its advantages, such as mild and controllable process, simple equipment operation, and wide selection of material systems.