The invention relates to a sweeping disc device of sweeping car, especially a sweeping disc avoiding device of sweeping car, the technical scheme of which is: the device comprises a support disposed on the car body and a rear arm connected with the support; the other end of the rear arm is connected with the front are baffle plate through a vertical rotating shaft; the front arm baffle plate is connected with the front arm through a level rotating shaft; the other end of the front arm is connected with a hydraulic motor; a sweep brush is disposed under the hydraulic motor; a hydraulic cylinder is disposed between the upright column on the rear arm and the front arm; double torsion springs are disposed on the rotating shaft at the connection point of the rear arm and the front arm baffle plate; a single torsion spring is disposed on the connection point of the front arm and the front arm baffle plate; the double torsion springs are twisted from the middle of steel body to the two ends along the same direction and around the same axis; the single torsion spring is twisted from the middle of steel body to one end. The invention has the advantages of simple and practical structure, low production cost, stable and reliable operation, long service life, less fittings and high sensitivity.