Basin water pollution prevention and control short plate screening method and screening system

The invention relates to the field of water pollution prevention and control, and discloses a short-plate screening method and screening system for watershed water pollution prevention and control, and the screening method comprises the following steps: S1, carrying out the hierarchical division of water environment control units in a watershed based on a division basis; s2, performing quantitative calculation and sorting on drainage basin pollution contributions; s3, based on water environment control unit division, pollution contribution quantitative calculation and sorting results, establishing a drainage basin investigation target list; s4, on the basis of the drainage basin troubleshooting problem judgment standard, the drainage basin troubleshooting target list is contrasted, and the water pollution prevention and control short board problem of the drainage basin is locked; s5, on the basis of the locked watershed water pollution prevention and control short problem, the watershed water quality standard