The invention discloses a pinus khasys diethanol amine stewing pulping method. Pinus khasys which is a Yunnan special wood fiber raw material is used, and after microwave cooperative pretreatment, stewing pulping is carried by using a diethanol amine solvent. Pulp prepared by the method is has the characteristics of high yield, high viscosity and high strength. Separated waste liquid can be directly reused as a pretreatment solution and a stewing solvent.