The invention relates to the technical field of automobile braking and discloses an antiskid device which comprises a fixing block with a limiting groove. A fan-shaped oscillating plate is hinged to the limiting groove and is slidably connected with a first rack; the first rack meshes with a first rotating wheel; the first rotating wheel meshes with a second rotating wheel; the second rotating wheel meshes with a second rack; a third rotating wheel and a fourth rotating wheel mesh to two ends of the second rack, and are winded with a first pull rope and a second pull rope; poke rods are connected to the tail ends of the first pull rope and the second pull rope; fixed plates and antiskid chains are arranged in the poke rods; hook blocks are arranged on the tail ends of the antiskid chains;the fan-shaped oscillating plate drives the poke rods to move, so that an antiskid chain is pulled out and is pressed to the lower end of a wheel, and a friction force between the wheel and the groundis improved. The antiskid device provided by the invention has the advantage of capability of reducing the slipping stroke and quickly braking for an automobile suddenly brakes on the frozen ground.