Multi-operation-mode boom sprayer

The invention provides a multi-operation-mode boom sprayer which comprises a vehicle body, a spraying rod and partition plate devices, the spraying rod is installed at the end of the vehicle body through a lifting mechanism, spraying heads are evenly arranged on the spraying rod, the partition plate devices are installed between the adjacent spraying heads, each partition plate device comprises a storage groove and folding cloth, and the folding cloth is folded and stored in the storage groove. Penetrating holes are formed in the two ends of the containing groove, line holes corresponding to the penetrating holes are formed in the hanging plate and the folding cloth, the containing ropes penetrate through the penetrating holes and the line holes to be connected to the lowermost layer of the folding cloth, unfolding and containing of the folding cloth are achieved by winding and unwinding the containing ropes, and therefore switching of a single-work mode and a composite relay work mode is achieved. By folding