The invention discloses a superwide electronic belt conveyor scale. The superwide electronic belt conveyor scale comprises a rack (1), a belt conveyor (2), a belt tensioning mechanism (3), a driving device (5) and a weighing device (4), wherein the rack is of a split connecting structure and comprises a left frame (8) and a right frame (13), a rack cross arm (9) which connects the right frame with the right frame, and at least two stand columns which respectively consist of vertical beams (14a) and cantilever type beams (14b), the bottoms of the left frame and the right frame are both connected onto the lateral beams of the stand columns, and the outer part of the right frame is connected with the vertical beams of the stand columns through bolts (15); and one side of the belt conveyor is fixed on the vertical beams of the stand columns, and the other side of the belt conveyor is supported by a side plate support (16) which is installed on the left frame. The superwide electronic belt conveyor scale breaks through the belt width limitation of an existing electronic belt conveyor scale, and the belt width can reach 3.6 meters; and the electronic belt conveyor scale is convenient to transport, install and maintain, not only can dynamically weigh materials, but also can control the material flow to be constant, has high metering precision and is stable.