The utility model provides a be favorable to solving little edger roll pass structure of zinc -plated base plate limit portion black line, belongs to the little edger roll equipment technical field of finish rolling for solve and eliminate zinc -plated base plate limit portion's black line and prolong little edger roll life cycle problem. Its technical scheme is: little edger roll pass structure includes the tank bottom, and the tank bottom comprises the upper portion tank bottom and the vertically lower part tank bottom of slope, upper portion tank bottom, lower part tank bottom smooth connection, and the smooth collars inclined plane down of connecting of fillet under the ground warp thread tank bottom of lower part groove, lower collars inclined plane is connected with the collars is smooth down. The utility model discloses simple structure, result of use are good, can effectively solve the middle base lower surface limit portion's fish tail that causes because of little edger roll collars and then lead to follow -up cold rolling production limit portion desquamation line mass problem, thoroughly eliminate the sideline defect, have reduced low reaches user's cutting edge volume, improve the wound efficiency power of product, the utility model discloses little edger roll life cycle can also prolong.