Stable USB connector

The utility model discloses a stable USB connector comprising an insulation body, terminals arranged on the insulation body, and a shield wrapping the insulation body; the shield and a tongue plate of the insulation body enclose to form a plugging port; the shield comprises mutually assembled an upper housing and a lower housing; two sides of the upper housing respectively and horizontally extend outwards to form a first welding matched plate in an integrated manner; two sides of the lower housing respectively and horizontally extend outwards to form a second welding matched plate in an integrated manner; the first and second welding matched plates on the same side are correspondingly welded; the upper and lower housings are mutually assembled and fixed through welding the first and second welding matched plates; assembling method is simple, and assembling fixation is stable, so the insulation body is compactly matched in the shield, thus improving assembling stability between the insulation body and the shield, and improving product stability and reliability.