Rotating blade device of chopping machine

The rotating blade device mainly comprises a cutter body and a driving shaft, the cutter body comprises two half cutter bodies, one sides of the two half cutter bodies are respectively and fixedly connected with a first assembly part and a second assembly part which are buckled with each other, the buckling positions of the first assembly part and the second assembly part are fixedly connected through a bolt, and the driving shaft is fixedly connected with the first assembly part and the second assembly part. The bolt is covered with a protection assembly, the protection assembly is fixedly connected with the half cutter body, and the cutter body is arranged on the driving shaft in a sleeving mode. The cutter body is divided into the two half cutter bodies, the damaged blade can be conveniently replaced in the later period, the two half cutter bodies are fixedly connected together through cooperation of the first assembling body, the second assembling body, the first inserting block, the second inserting bloc