Sodium alginate (ALG)carboxymethyl cellulose (CMC) blend fiber with excellent hygroscopicity and good mechanical properties was prepared by extruding ALGCMC blend solution into calcium chloride solution. Influences of spinning process parameters and absorbing condition on the moisture absorption performance of ALGCMC blend fiber were studied in this article, and the best spinning parameters and the moisture absorbing properties of ALGCMC blend fiber were found by using the centrifugal dewatering method. The absorbing kinetic curve of ALGCMC blend fiber was obtained according to the experimental results.