SAN reaction feeding control method, system and storage medium thereof

The invention relates to an SAN reaction feeding control method, a system and a storage medium thereof. The method comprises the steps: obtaining a measurement ratio of a solvent, styrene and acrylonitrile in a circulating solution pipeline based on a measurement result of the circulating solution pipeline; obtaining a rated ratio of a solvent, styrene and acrylonitrile based on rated contents of the solvent, styrene and acrylonitrile in the SAN reaction; according to the measurement proportion and the rated proportion, the needed feeding flow of styrene and acrylonitrile in a fresh feeding pipeline is calculated on the basis of a preset feeding algorithm, so that the proportion of a solvent, styrene and acrylonitrile in a mixed solution obtained after the fresh feeding pipeline and the circulating solution pipeline are mixed reaches the rated proportion; the feeding of the fresh feeding pipeline is controlled according to the required feeding flow of styrene and acrylonitrile. The invention has the effect of