EGR system control method and device based on differential pressure signal simulation and medium

The invention relates to an EGR system control method and device based on differential pressure signal simulation and a medium. The method comprises the steps that a plurality of pressure difference signals of a target Venturi flowmeter in a target EGR system within a preset time period are collected; determining cycle values of the plurality of differential pressure signals and amplitude values of the plurality of differential pressure signals; acquiring associated data values corresponding to the plurality of differential pressure signals; performing simulation analysis on the period values of the plurality of pressure difference signals, the amplitude values of the plurality of pressure difference signals and the associated data values corresponding to the plurality of pressure difference signals through a virtual rack to obtain a first relational expression between the period and the associated data and a second relational expression between the amplitude and the associated data; and controlling the targe