Injection control method and system for chemical displacement fluid

The invention discloses an injection control method and system for chemical displacement fluid, the method and system are applied to a chemical displacement system of an oil well system, and specifically, injection fluid parameters of a wellhead of a water injection well and produced fluid parameters of a wellhead of a production well are collected according to the collection frequency; the injection fluid parameters and/or the produced fluid parameters are comprehensively processed according to the oil well data, a processing result is obtained, the original injection scheme is adjusted based on preset case data, a simulation algorithm, an expert decision scheme and/or the processing result, and a new injection scheme is obtained; and based on the new injection scheme, the automatic batching tank, the heating and stirring tank, the performance monitoring and adjusting tank and the injection allocation pump are controlled, so that the chemical displacement fluid is injected into the wellhead of the water inje