The species of Prunus mume "Da Ye Qing"were used raw material and the extraction of polyphenol from flowers,branches and leaves were analyzed.The free radical scavenging and the reducing power of these extracts were evaluated by DPPH,ABTS,chemiluminescence and FRAP,respectively.Then,the thermal stability of these three extracts were also studied.The results showed that all three Prunus mume extracts(PF,PB,and PL) were rich in polyphenol.PB has the best free radicals scavenging ability.PF has the best reducing power.The correlation coefficients in each case were significantly high(P< 0.05).PL was the most stable in high temperature.