Protective shell assembled on safety belt lock catch and safety belt lock catch

The utility model discloses a protective shell assembled on a safety belt lock catch, which comprises an upper cover and a lower cover which are buckled with each other, and comprises an anti-vibration part, a first clamping part and a second clamping part, the anti-vibration component protrudes out of the inner end face of the lower cover and can abut against a lock body of the safety belt lock catch. The first clamping parts are oppositely arranged on the first edges, abutting against each other, of the upper cover and the lower cover in the horizontal direction, the first edges are the edges close to the opening end of the protection shell, and clamping of the upper cover and the lower cover in the horizontal direction is achieved through the first clamping parts. The second clamping parts are oppositely arranged on the inner end faces of the upper cover and the lower cover in the vertical direction and located on the second edge where the upper cover and the lower cover abut against each other, the second