The invention relates to a direct-plug water-sealed connector component, a plug thereof and a socket thereof. The connector component comprises a plug shell and a plug insulator which are connected together; a group of pin contact pieces are axially arranged on the plug insulator; a plug vulcanized body covers the front end and surrounding wall of the plug insulator through vulcanization; the rear end of the plug vulcanized body extends to seal and cover the front end of the plug shell; the pin contact pieces are fixed into a whole through the vulcanization by the plug vulcanized body; the parts, exposed from the plug vulcanized body, of the pin contact pieces form pin plug-in connection sections; the parts, close to the plug vulcanized body, of the pin plug-in connection sections are covered by a corresponding vulcanized protrusion extended from the front end of the vulcanized body to form vulcanized plug-in connection sections; the parts, on the front end of the vulcanized plug-in connection sections, of the pin plug-in connection sections are bare pug-in connection sections; the diameter of the bare pug-in connection sections is smaller than that of the vulcanized plug-in connection sections; and a plug-in connection guide part is arranged at the surface joint part of the bare pug-in connection sections and the vulcanized plug-in connection sections. The connector componentcan be plugged directly in water.