The utility model discloses an automobile reading lamp adjusting device which comprises a box body, a containing cavity is formed in the box body, a reading lamp is arranged in the containing cavity, and a left-right inclination angle adjusting mechanism used for driving the reading lamp to rotate left and right is arranged in the containing cavity. A front-back inclination angle adjusting mechanism used for driving the box body to rotate front and back is arranged at the top end of the box body, the left-right inclination angle adjusting mechanism comprises a first fixing base, and the bottom of the first fixing base is fixedly connected with the middle of the upper surface of the reading lamp. According to the utility model, through the cooperation between the left-right inclination angle adjusting mechanism and the front-back inclination angle adjusting mechanism, the multi-angle adjustment of the reading lamp can be realized, and the position direction of a person sitting in an automobile can be continuously illuminated, so that the person can read or check some things by utilizing the illumination light of the reading lamp without moving the position, and the working efficiency is improved. Operation is simple and convenient, and practicability is high.