This ditch cleaner is the machine for cutting, fishing for float grass and reed in ditches and then clearing silt. This machine is composed of base, working arm, rotary bearing, clearing table, hydraulic cylinder, oil motor and hydraulic control system. It is fully hydraulically-driven. Clearing table, cutter and cantilever can continuously act. It has strong grass cutting in small ditches and water surface cleaning functions. It can cut high grass such as reed and wild cane shoots. It can also cut and harvest water plants such as water peanut and duckweed. Operated by only one person, it can complete grass cutting, conveying, cleaning and silt clearing.