The effects of the reaction conditions in nitrosation of cellulose and the regeneration conditions of cellulose nitrite to cellulose on the molecular weight of regenerated cellulose, and the blending of cellulose nitrite or cellulose sulfate with PAN were investigated. The results are as follows. The molecular weight of regenerated cellulose is influenced by nitrosation temperature, nitrosation time and the alkalinity of regenerating liquor. X-ray diffractogram shows that the regenerated cellulose has cellulose II structure. Polyacrylonitrile is miscible with cellulose sulfate to a considerable extent, and the film of their blend is so outstanding in anti-static property that it is considered to be able to produce anti-static polyacrylic fiber.