The invention belongs to the field of vehicle modification parts and particularly relates to a foldable table which is mounted on the wall surface in a vehicle or the rear surface of a vehicle seat and can be unfolded. The folding table comprises a frame body connected onto the wall surface. The folding table is characterized in that a folding table plate is connected to the inside of the frame body; a pair of swing arms are symmetrically arranged in the frame body; one end of each swing arm is connected onto the frame body; the other end of each swing arm is connected to one side of the folding table plate; the lower end of the folding table plate is connected onto a sliding mechanism; the sliding mechanism is connected onto the frame body; and a power device for driving the sliding mechanism to slide up and down is arranged at the lower part in the frame body.