The utility model discloses an electronic control system for a sideboard and a scraping plate of a milling machine. The electronic control system comprises a three-position self-reset switch, diodes, relays, and a plurality of electromagnetic valves used for realizing four working states of lifting, falling, locking and floating of the sideboard and the scraping plate, wherein the three-position self-reset switch is mounted on an operation box; the diodes and the relays are mounted in the operation box; the electromagnetic valves are respectively mounted on the corresponding electromagnetic valves in a dispersing manner, and used for controlling on/off of a hydraulic oil way; the three-position self-reset switch, the diodes, the relays and the electromagnetic valves are in electric connection. According to the utility model, the four working states of lifting, falling, locking and floating of the sideboard and the scraping plate are controlled to be organically combined, so that once the sideboard and the scraping plate are lifted, the floating state is relieved, and the sideboard and the scraping plate are in the locking state all the time, and once the sideboard and the scraping plate fall, the locking state is relieved, and the sideboard and the scraping plate are in the floating state all the time; the operation is simple and convenient, and deformation and damage of structural components due to misoperation are prevented.