Preparation method of high-strength and high-crimp viscose fibers

The invention discloses a preparation method of high-strength and high-crimp viscose fibers. The preparation method comprises the following steps: (1) carrying out dipping, squeezing, crushing, aging,yellowing, grinding, filtering and defoaming on cellulose pulp to prepare a spinning solution; (2) injecting a denaturant solution into the spinning solution, and carrying out uniform mixing to obtain a denatured spinning solution; (3) feeding the denatured spinning solution into spinning bath, and carrying out low-spinning-speed spinning forming to obtain nascent fiber tows; (4) first carrying out plasticizing drafting on the nascent fiber tows through plasticizing bath, and then carrying out air bath drafting and cooling in cold air; and (5) refining, oiling and drying the drafted fibers toobtain the high-strength and high-crimp viscose fibers. According to the preparation method of the high-strength and high-crimp viscose fibers, the crimp effect and the durability of the crimp effectof the fibers can be great