The invention discloses a high-precision energy-saving fish scanning and counting device, which belongs to the field of counting devices and includes a fish box. The top wall of the fish box is provided with a fish outlet, and one side of the fish box is provided with a fish outlet. , the outer side of the fish outlet of the fish box is provided with a plurality of fishway partitions arranged in parallel, and the plurality of the fishway partitions are fixed to each other by skeleton rods, and the fish box and the fishway partitions are all connected by brackets The support is fixed, the lower side of the fishway partition is provided with a conveying mechanism, the conveying mechanism includes a conveying belt, a conveying roller and a conveying motor, and the conveying belt is installed on the conveying roller. The invention can realize anti-blocking conveying of fish, and realize continuous and efficient counting during conveying. When counting, multiple fish can be prevented from passing through the counter at the same time, so the equipment counts more accurately, and it is not necessary to measure the size of the fish during counting. Classification, which greatly saves operation time, and the load on the equipment during operation is small, so it is more energy-saving and environmentally friendly.