① According to the manufacturing methods, it can be divided into three categories: chemical pulp (including caustic soda pulp, kraft pulp, sulfite pulp, etc.), mechanical pulp (including grinded wood pulp, disc mill mechanical pulp, hot mill mechanical pulp, etc.) and chemical mechanical pulp;

② According to the variety of raw materials, it can be divided into wood pulp, straw pulp, bamboo pulp, cotton pulp, waste pulp, etc;

③ According to the processing depth, it can be divided into natural color pulp, semi bleached pulp, bleached pulp and refined pulp;

④ According to the yield of wood pulp, it can be divided into chemical pulp (yield 40-50%), high yield chemical pulp (yield 50-65%), semi chemical pulp (yield 65-84%), chemical mechanical pulp (yield 85-94%) and mechanical pulp (yield 94-98%);

⑤ According to the use of the enterprise's own pulp is called self pulp, as a commodity sale is called commodity pulp. For a specific variety, it is often named by several different classification methods, such as bleached kraft softwood pulp, natural sulfite reed pulp, poplar ground wood pulp, etc., so that users can generally understand the properties and uses of pulp according to its name.

        In all kinds of pulp, chemical pulp still accounts for the largest proportion. In 1987, the total output of chemical pulp in the world reached 111.35 million tons, accounting for 71% of the total output (155.86 million tons), and mechanical pulp accounted for 21%. Due to the continuous improvement of waste paper recycling rate and the relative increase of fillers and coatings used in paper, the consumption of pulp is relatively reduced, so the growth rate of pulp is generally lower than that of paper and paperboard.