An angle-adjustable auxiliary vehicle mirror includes a base and a mirror. The base has a concave rest with a threaded hole. The mirror fits in a concave chamber of the base, with an auxiliary lens combined on top, having an arc-shaped convex formed at the bottom to engage with the concave rest. An opening is bored in the arc-shaped convex. A washer with a through hole is put on the arc-shaped convex. A screw is orderly inserted through the through hole and the opening to engage with the threaded hole to keep the mirror positioned, with the arc-shaped convex contacting with the concave rest. With the screw not tightly engaged with the mirror, the arc-shaped convex can axially slide on the concave rest to alter the angle of the mirror.