The super-absorbent compound resin was synthesized by aqueous solution polymerization using acrylic acid（AA），2-acrylamide-2-methyl propane sulfonate（AMPS），initiator potassium persulphate，cross-linking agent N，N-methylenebisacrylamide and kaolin clay mineral as raw materials. The optimum reaction condition was obtained as follows: 4∶1 mass ratio of AA to AMPS，0.2%，0.06% and 10% initiating agent，cross-linker and kaolin dosage for total monomer in quality respectively，72℃ reaction temperature，75% neutralization degree of acrylic acid. The absorption ratio of super-absorbent resin synthesized under optimum condition for pure water and salt water was 1200 and 92.3 g/g，respectively. The water loss and retention property of resin was studied，and the results showed that the water loss rate increased with extending time and increasing temperature. The retention water rate of resin increased first and then decreased with increasing dosage of kaolin. When the dosage of kaolin was 10%，the water retention rate reached to maximum value 82%.