The invention provides a V-shaped metal component and a light steel truss connected with the V-shaped metal component, which is an integrated V-shaped connector formed by pressing a steel plate. The outer edges of the web members of the two limbs are provided with outward flanging, while the inner edges of the web members of the two limbs are provided with inward flanging, wherein the top terminals of the outward flanging and the inward flanging extend smoothly to the lateral sides of the upper node plane in an arc shape, the top terminal of the outward flanging extends smoothly to the external side of the lower node plane in an arc shape, and the bottom terminal of the inward flanging extends smoothly in an arc shape and crosses with the bottom terminal of another inward flanging. Two upper node planes are formed at the upper part of the two limbs, wherein the two upper node planes are provided with upper screw holes; the bottom terminals of the two limbs cross with each other to form an integrated lower node plane, wherein the lower node plane is provided with lower screw holes. Symmetrical indentation is arranged between the web members of the two limbs, wherein the terminal of the indentation extends into the upper node plane and the lower node plane of the web members of the two limbs. The V-shaped metal component can be connected with an upper chord and a lower chord via screws to form a light steel truss, and is applicable to the houses with light steel keel structure, and greatly increases the bearing capacity.