Drainage ditch trash holding device

The invention relates to the technical field of water conservancy equipment, in particular to a drainage ditch trash holding device which comprises supporting covers fixed to the two sides of the inner wall of a drainage ditch, trash holding fences are fixed to the middles of the supporting covers, and the drainage ditch trash holding device further comprises a cleaning mechanism which is installed on the supporting covers and connected with the trash holding fences. The clamping mechanism can always drive the clamping comb teeth to fix the dirt after the dirt cleaning comb teeth drive the dirt to leak out of the water surface, so that the dirt cannot slide off, and when the clamping comb teeth rotate to the top end of the trash rack, the clamping comb teeth can be gradually loosened under the action of the reset mechanism, so that the dirt can be conveniently discharged, and the cleaning efficiency is improved. And meanwhile, the scraping mechanism conducts rotary scraping on the side faces of the dirt clean