The invention discloses novel polysilane containing silafluorene. The polysilane comprises a silafluorene compound and a compound selected from ethanol, nitrobromobenzene, trimethylsilyl bromide, diazosulfide and the like. Because of peculiar structure, the novel polysilane has special properties in the aspects of dissolubility, heat stability, ultraviolet absorption, fluorescence and the like. Based on the special properties, the novel polysilane has wide application prospects in the aspects of photoresists, photoinitiators, waveguide devices, photoconductors, non-linear optic materials and the like.