The objective was to establish the identification method of Rhizoma cyperi and determination method of ferulic acid in Xin Tong Ning pill.TLC was used for identification of α-cyperone in Rhizoma cyperi and HPLC for determination of ferulic acid.Hypersil-ODS C18 column (250 mm × 4.6 mm, 5μm) inspection wavelength was at 323 nm and the follow rate was 1 mL/min, with methanol-water-acetic acidas mobile phase.The quant. evaluation of ferulic acid exhibited a linear range of 0.005-0.5 μg (r = 0.9999, n = 6), with an average recovery of 98.0% (n = 6).The result of TLC identification was up to requirement.The above methods are accurate and specific for qual. anal. of Rhizoma cyperi and determination of ferulic acid in Xin Tong Ning Pill.