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The method of separation of seven sulfonamides by HPLC with a new phenylalanine substituted calix [4] arene bonded silica stationary phase(PHE-Cx4)was establishment The separation was performed on PHE-Cx4 column with a mobile phase of acetonitrile-H2O ( 20:80,v/v).The flow rate was 1.0 mL/min and the detecting wavelength was 270 nm.The column temperature e was 30 ℃.The separation of seven sulfonamides on the PHE-Cx4 column was better than the C18 column,and the elution order of the substance was very different.