Rearview mirror with rotatable lens

The invention relates to a rearview mirror with a rotatable lens, which comprises a base, a mirror cover arranged on the base and a lens arranged in the mirror cover. The rearview mirror is characterized by also comprising a rotary support seat which is arranged in the mirror cover for supporting the lens and ensuring that the visual angle of the lens can be adjusted. The outer surface of a spherical shell on an adjustment seat of the rotary support seat is arranged in a ball-head groove of a permanent seat, and a press seat is put in the spherical shell of the adjustment seat. A post on the permanent seat passes through a central hole on the spherical shell and a post hole on the press seat, and a spring is arranged in a spring hole on the press seat. A spring cover is sleeved on the spring, and a bolt passes through a bolt hole on the spring cover, the spring and the post hole in the post of the permanent seat and is screwed into a square nut so as to ensure that the adjustment seat,the press seat and the p