The invention discloses a pretreatment system for raw materials to be peeled, and relates to the technical field of peeling equipment. The pretreatment system for raw materials to be peeled comprises a shell body, a magnetic rod frame, a stirring mechanism, a filter screen and a control assembly, wherein a material inlet is formed in the upper end opening of the shell body; the magnetic rod frame comprises at least two first magnetic rods and at least two second magnetic rods; a stainless steel skin wraps the outer layer of each of the first magnetic rods and the outer layer of each of the second magnetic rods; the magnetic rod frame is hung on the shell body through hooks; the stirring mechanism is arranged at the central position of the shell body; the stirring mechanism comprises a stirring motor and a stirring shaft; the stirring shaft is located below the stirring motor and is connected with the stirring motor; the filter screen is arranged in the shell body and is located below the stirring shaft; and the control assembly is electrically connected with the stirring mechanism. Through the adoption of the pretreatment system for raw materials to be peeled provided by the invention, the problems that iron impurities in the raw materials to be peeled cannot be removed in time and the peeling efficiency is low are solved.