Method for preparing regenerated cellulose fiber based on wet spinning and regenerated cellulose fiber

The invention provides a method for preparing regenerated cellulose fibers based on wet spinning and the regenerated cellulose fibers, and belongs to the technical field of cellulose carbamate solution spinning. According to the invention, bicarbonate, or a composition of bicarbonate and carbonate, or sulfite, or a composition of hydrosulfite and sulfite is used as a coagulating bath component and is used as a mild coagulating solution, so that the cellulose carbamate-containing solution can be uniformly coagulated and formed in the coagulating bath, and primary gel fibers are formed; in the process, the primary gel fiber does not completely form a cellulose intermolecular hydrogen bond network, sufficient curing and stretching in coagulating bath and subsequent drafting are facilitated, then the fiber with the circular section, high strength and excellent performance is obtained, and the fiber is smooth in surface, soft and glossy, compact in section, uniform in structure and free of an obvious skin-core str