The preparative high-performance liquid chromatography system is a liquid phase equipment used to separate the mixture after the synthesis reaction from the natural substance, refine the target compound, and recover the high-purity target compound. The single loading amount is from g level to kg level. This product is very suitable for the purification production needs of universities, pharmaceutical factories, chemical industry, scientific research units, etc., and solves the time-consuming and labor-consuming problems of traditional atmospheric pressure chromatography systems.