Engineering plastic junction box

The utility model relates to the technical field of plastic junction boxes, in particular to an engineering plastic junction box which comprises a box body, the top of the box body is open and is buckled with a box cover, and the left side and the right side of the box body are each provided with a threading hole communicated with the interior of the box body; the box body is internally provided with two vertical columns of bunching units which are sequentially arranged in the length direction of the box body, each bunching unit comprises a sliding plate which is connected to the box body in a sliding mode in the vertical direction, the sliding plate is provided with a plurality of elastic over-half rings which are sequentially arranged in the width direction of the box body, and the inner walls of the elastic over-half rings define a storage cavity used for storing electric wires; and the side part of the elastic half ring is provided with a notch which is communicated with the accommodating cavity and is ex