Multi-restaurant-shop shared oil fume exhaust system and commercial complex

The utility model discloses a multi-catering-paver shared oil fume exhaust system which comprises a shared oil fume exhaust air duct and a plurality of oil fume exhaust branch pipes connected with theshared oil fume exhaust air duct, each oil fume exhaust branch pipe is provided with a first-stage oil fume exhaust assembly and a fume collecting hood, and the shared oil fume exhaust air duct is provided with a second-stage oil fume exhaust assembly. The first-stage oil fume exhaust assembly comprises a first-stage oil fume purifier, a first-stage oil fume exhaust fan and a check valve which are connected in series; and the second-stage oil fume exhaust assembly at least comprises a second-stage oil fume exhaust fan. A negative pressure environment is formed in the shared oil fume exhaust duct through the second-stage oil fume exhaust fan, and oil fume exhausted by the oil fume exhaust branch pipes corresponding to the catering pavements can be smoothly exhausted into the shared flue; aprimary oil fume purifier