The invention relates to the technical field of energy-fed direct current electronic load control, in particular to a fuzzy PI control method of a boots circuit simulating load cell, Normalization ofcontrol variables and selection of the same control variable, that is, input current average value IIN_Ref, are used to control multiple analog load modes. In addition, the feedback control loop and fuzzy PI controller are designed to track the input current more accurately in the nonlinear boost circuit, so as to meet the requirements of better dynamic response speed and static error, reduce current overshoot and protect the circuit system.