Isocyanates,　aldehydes　and　metal　salts　were　applied　as　surface　crosslinking　agent　for　superabsorbent　polymers　prepared　by　solution　polymerization　of　acrylic　acid.　The　results　showed　that　the　superabsorbent　polymers　treated　by　formaldehyde　possessed　good　properties,　including　high　absorption　speed,　easy　dispersion　in　aqueous　solution,　dry　surface　of　the　gel　after　absorption,　pretty　absorbency　under　pressure,　and　simple　surface　treating　process.　When　5　g　superabsorbent　polymer　was　treated　with　0.1　g　formaldehyde　for　12　h　at　room　temperature,　the　superabsorbent　polymer　got　the　optimum　performance.