A new kind of chitosan-sodium alginate absorbent was prepared using natural products chitosan and sodium alginate as raw material in the presence of CaCl₂ . The functional groups of the CS-SA absorbent was characterized by FT-IR. The results show that chitosan and sodium alginate produce electrostatic attraction. The effects of CS-SA dosage, adsorption time and pH on adsorption property for low concentration Cr ( VI ) in electroplating wastewater were studied, and corresponding adsorption kinetics was investigated. The experimental results show that the adsorption rate can reaches 98 . 86 % under the optimal conditions of dosage 0 . 15 g, absorption time 120 min and pH 6 . The absorption kinetics accords with the pseudo-second-order equation. The desorption-regeneration experiment reveals that CS-SA adsorbent can regenerate and be reused.