Preparation method of biodegradable nano cellulose cotton pulp

The invention relates to the technical field of cotton pulp, and discloses a preparation method of biodegradable nanocellulose cotton pulp, which comprises the following steps: screening high-quality cotton linter raw materials, mixing with alkali liquor, cooking, pulping, bleaching and carrying out acid treatment, and adding a compound cooking aid in the cooking process, so that the biodegradable nanocellulose cotton pulp is prepared by utilizing the advantages of the compound cooking aid. According to the present invention, the process is simple, the process is easy to operate, the process is easy to control, the removal of lignin and hemicelluloses is accelerated, the cooking time is shortened, the sodium dodecyl sulfate is adopted as the surfactant so as to improve the dispersion effect of the 9, 10-dihydro-9, 10-dioxo-2, 7-anthracene disulfonic acid disodium salt in the cooking liquid, and the urea can improve the glycan retention rate and increase the cellulose content in the slurry. Besides, due to the