Liquid chromatography analysis method and liquid chromatography analysis device

The invention provides a liquid chromatography analysis method and a liquid chromatography analysis device, which can accurately, simply and quickly measure a plurality of components contained in a sample by using liquid chromatography. In the liquid chromatography analysis method for quantifying a plurality of components contained in a measurement sample by liquid chromatography, the liquid chromatography analysis method comprises: a pretreatment step for separating each component from the plurality of components; and a dosing step, when the elution time when each component is quantified by primary liquid chromatography in a state in which a plurality of components are mixed together is set to T0, the elution time is set to T0. The separated components are quantified by adjusting the measurement conditions of the liquid chromatography of the components so that the components can be quantified by the liquid chromatography such that the elution time is less than T0 and the difference between the elution times