Connector and metal housing thereof

The utility model provides a connector and a metal housing thereof. The metal housing is a metal flat tube with no connecting seam; the metal housing comprises a fixing part, a plugging part and a connecting part which extend integrally; the connecting part is used in transition connection between the fixing part and the plugging part; and the end face area of the fixing part, the end face area of the plugging part and the end face area of the connecting part decrease in turn. The metal housing provided by the application has the integrated metal flat tube structure; because the metal housing has no connecting seam, strength is high; and the metal housing can be manufactured to have various curved surface structures.