Light intensity adjusting mechanism of 3D printer

The utility model discloses a light intensity adjusting mechanism of a 3D printer, which structurally comprises a printing chamber, a connecting wire, a protective door, a perspective window, a handle, a connecting piece, a 3D printer body, a printing table, an ultraviolet light sensor, an auxiliary shielding device, a fixing rod and a lock catch. The ultraviolet light sensor can be used for detecting the light intensity of the printing table, materials are prevented from being polluted by external ultraviolet light, the overall color effect and quality of a finished product printed in the later period are guaranteed, the auxiliary shielding device is arranged at the upper end of the rear side of the protective door, and the folding oil cloth on the rotating roller can be pulled out in a rotating mode through the pull rod. The sliding buckles and the lock catches on the fixing rods are buckled and fixed, the oil cloth can be effectively unfolded and folded, shading work is conducted inthe printing chamber, di