humic acid/acrylic acid-urea controlled release superabsorbent resin with interpenetrating polymer networks was prepared by solution polymerization using acrylic acid(AA) urea and humic acid(HA) as raw materials, N`N-methylenebisacryla mide as crosslinkingagent and ammonium persulfate as initiator, respectively. The effect of the neutralization degree acrylic acid, reactant ratio, reaction temperature, the amount of initiator and cross-linking agent on the water absorbent ability were investigated. In addition, The structures and performance of products were studied by FTIR、SEM、DSC and Pressure potential method．The results show that the obtained superabsorbent resin has maximum waterabsorption ability up 310g/g, available water rate up to 93.81% and has good water retention performance when the polymerization temperature is 80℃, the amount of initiator,crossing agent, humic acid and urea in the acrylic acid were 0.3%, 0.06%, 20% and 50% respectively.