Abstract: 【OBJECTIVE】A novel superabsorbent of chitosan-g-poly(acrylic acid)/sodium humate (CTS-g-PAA/SH) was synthesized through graft polymerization among chitosan, acrylic acid and sodium humate in aqueous solution. 【METHOD】The water absorbency in various saline solutions, resweling behaviors, the slow-release behavior of SH and the practical water absorbency in soil of CTS-g-PAA/SH superabsorbent were systematically investigated. 【RESULTS】The CTS-g-PAA/SH superabsorbent with 10% sodium humate gave water absorbency of 183g/g in distilled water and 41g/g in 0.9% NaCl solution. The CTS-g-PAA/SH superabsorbents have better reswelling behaviors. Comparing with CTS-g-PAA, 6.75% of water can still be saved in the sand soil containing 1.0% superabsorbent after 20 days. SH reacts with PAA during the polymerization process and forms a more intact polymeric network. When the SH content is above 30% in superabsorbent, the excess SH only acts as filler in the polymeric network and the slow-release of SH is easy.【CONCLUSION】Introducing SH could improve water absorbency of the CTS-g-PAA superabsorbent. CTS-g-PAA/SH superabsorbent not only can reduce significantly production cost, but also have slow-release capacity of humic acid.