Waterproof straight pipe sleeve

The utility model discloses a waterproof straight pipe sleeve, which comprises two half sleeve bodies respectively in a straight pipe shape, wherein a male and female mechanism which are convexly and concavely jogged is arranged on the joint surface of the two half sleeve bodies; at least two movable holding hoops are arranged on the half sleeve bodies; reducing joints or inner diameter outer expanding joints are respectively formed in the edges of two pipe openings of the two half sleeve bodies; axial reinforcing ribs which are uniformly distributed are respectively arranged on the inner wall surfaces of the two half sleeve bodies; the inner diameter outer expanding joints which can be matched with the reducing joints are respectively formed in the edges of the two pipe openings. The waterproof straight pipe sleeve has the characteristics of simple structure, convenience and reliability in use, a certain sealing effect, waterproofness, and the like, prolongs the service life thereof, improves the use effect,