The invention discloses an HPLC detection method for alpinia-cyperus preparations. The HPLC method is used for simultaneous determination of the contents of 5 components, namely galangin, kaempferide, sweet ketene, nootkatone and alpha-cyperone, in the alpinia-cyperus preparations. The HPLC method comprises the following steps: (1) establishing a standard curve of galangin, kaempferide, sweet ketene, nootkatone and alpha-cyperone; (2) determining the contents of galangin, kaempferide, sweet ketene, nootkatone and alpha-cyperone in a sample to be detected. According to the HPLC detection method provided by the invention, various components in the alpinia-cyperus preparations can be determined simultaneously. The HPLC method is high in specificity, can comprehensively reflect information, is simple and convenient, quick and accurate, and is accurate and reliable in determination result, so that the quality of the alpinia-cyperus preparations can be effectively monitored, and the medicine safety is improved.