The polyphenols were prepared by subcritical water extraction（SWE） and macroporous adsorption resi n AB-8， and their antioxidant activity and stability were also studied. The results showed that the yield of polyphenols in lotus seeds was 40.3%， and the purity of polyphenols was 99.50%. The scavenging rates of DPPH， ABTS+， O·2-， NO2- were 95.45%， 99.63%， 7.347% and 41.2%， respectively， when the concentration was 100 μg/mL. Polyphenols are suitable for preservation at 4 ℃， dark， pH 2-6 conditions， salt will not damage lotus seed hull polyphenols， sucrose and glucose on the lotus seed hull polyphenol have a certain protective effect.