Liquid chromatograph for Chinese herbal medicine analysis and detection

The utility model discloses a liquid chromatograph for Chinese herbal medicine analysis and detection, which comprises a case and a column oven arranged in the case, a chromatographic column is arranged in the column oven, and the front side of the column oven is provided with an openable and closable oven door; the interior of the column oven is divided into a temperature adjusting chamber and a constant temperature chamber through a vertical partition plate extending in the front-back direction. Ventilation openings are formed in the upper portion and the lower portion of the vertical partition plate. An air supply assembly used for driving air flow to vertically flow and a temperature control assembly used for adjusting the temperature of the air flow flowing through the temperature adjusting chamber are arranged in the temperature adjusting chamber. The constant temperature chamber is internally provided with a sliding rail extending along the front-back direction and a drawing plate mounted on the slidin