Insulator and connector

The invention relates to the technical field of connectors, in particular to an insulator and a connector. A through hole penetrating through a main body of the insulator is formed in the insulator, and connecting parts are arranged on the outer wall of the insulator and the hole wall of the through hole; along the axial section of the insulator, the insulator forms a first insulating part and a second insulating part which are detachably connected; a first assembling part is formed on the face, facing the second insulating part, of the first insulating part, a protruding insulating protruding rib is formed on the first assembling part, a second assembling part is formed on the face, facing the first insulating part, of the second insulating part, and an inwards-concave assembling groove is formed in the second assembling part. And when the first insulating part and the second insulating part are assembled, the insulating convex ribs can extend into the insulating convex ribs. According to the invention, the