The invention discloses a food brushing device, comprising a conveying belt, a liquid trough, a brushing frame and a driving mechanism; the brushing frame comprises a bracket, an electric motor, an eccentric wheel, a driving link rod, a lever, an upper swaying frame, a lower swaying frame, a swaying rod and a brush; the bracket is fixed on a free end of the driving mechanism, the eccentric wheel is synchronously linked to the electric motor, the lever is pivoted on the bracket; one end of the driving link rod is hinged to an eccentric shaft of the eccentric wheel, and the other end of the driving link rod is hinged with the lever; an upper swaying link rod is arranged between the upper swaying frame and the upper end part of the lever, wherein both ends of the upper swaying link rod are respectively hinged with the upper swaying frame and the lever; a lower swaying link rod is arranged between the lower swaying frame and the lower end part of the lever, wherein both ends of the lower swaying link rod are respectively hinged with the lower swaying frame and the lever; the upper part of the swaying rod is hinged to the upper swaying frame, and the lower part of the swaying rod is hinged to the lower swaying frame; and the brush is fixedly connected to the lower end part of the swaying rod. By adopting the invention, the food brushing efficiency and the food heath safety are improved.