The trachea and lungs were collected from 11 death chicken with suspected avian influenza.According the sequences of HA gene of H9N2 in GenBank, RT-PCR was used to amplify HA gene of two cases, named AH1 and AH2, then they were sequenced.The length of HA gene of AH1 and AH2 was 1683 nt, homol. was 98.9%, only 13 nucleotides were different.Homol. of HA gene of AH1 and AH2 was 90%-97% according to HA gene of H9N2 in GenBank.Cleavage site of HA gene of AH1 and AH2 was RSSR↓GLF.The research provided the basis for prevention and treatment of avian influenza in Chuzhou.