In this paper, a kind of agar fiber was prepared via wet spinning method.The tensile strength and water absorption of agar fibers were studied, and the morphology of fibers were examined by scanning electron microscopy.The results indicates that the dimethyl sulfoxide (DMSO) was selected as the solvent, 50% ethanol solution was selected as the coagulation bath, and the so-spinning fiber has good fiber morphology. The tensile strength of the agar fiber reached 5.52 cN/tex, water swelling capacity reached 114% in distilled water and 111% in 0.9% saline solution with the dope concentration of 12%.