Vehicle projection light and headlight

The invention relates to a vehicle projection light which comprises a curved reflector, a mounting part, a light source, at least one first retainer protrusion, a first fixing device and a second fixing device. The curved reflector is provided with a front opening and a rear opening, and the mounting part is formed by integrally extending outwards from the curved reflector near the periphery of the rear opening; the light source comprises a mounting seat and a luminophor which is inserted in the curved reflector after penetrating through the mounting part and the rear opening ; the first retainer protrusion protrudes from the outer side of the curved reflector at a joint of the mounting part and the curved reflector; the first fixing device is detachably arranged on the mounting part and used for mounting the vehicle projection light on a bulb mounting structure of a vehicle; and the second fixing device is constructed into the structure that the mounting seat can be detachably kept inthe mounting part. The v