The invention discloses a special net-dragging fishing device for black carps. Upper and lower net-dragging steel ropes on a net body are connected and fixed to form a net body; inner inverted whiskers are arranged on the net body in an inner cavity at the rear end of the net body; the inner inverted whiskers are inwards connected with inner inverted whisker fish inlets in an extending mode; the inner inverted whisker fish inlets are fixed by digging ropes of the inner inverted whisker fish inlets and extend to the upper surface of a net wrap; a net body cover is arranged at the front end of the net body; a floater steel rope is connected on the net body cover; a floater is connected on the floater steel rope; a tightening net steel rope and a pendant net steel rope are respectively connected at the upper and the lower ends of the net body cover; the pendant net steel rope is connected with a pendant to form a net-dragging opening; suction opening net walls are connected at net openings at two sides of the net-dragging opening; the upper surface of each suction opening net wall is connected with a net-dragging rope; and under the action of the net-dragging rope, the net body cover, the floater net steel rope, the tightening net steel rope and the pendant net steel rope can realize that the net-dragging opening is gradually expanded by dragging.