Optical fiber coupler capable of being precisely adjusted in multiple dimensions

The invention relates to an optical fiber coupler capable of being precisely adjusted in multiple dimensions, which comprises a box body, an offset plate, a lens unit, Z-direction adjusting screws, an adjusting mechanism and an optical fiber connector, the interior of the box body is in threaded connection with the offset plate through a plurality of Z-direction adjusting screws, the offset plate is in magnetic adsorption connection with the lens unit, the box body is fixedly connected with the optical fiber connector, the side face of the lens unit is provided with the adjusting mechanism in the box body, the size is small, auxiliary adjustment does not depend on an additional moving platform, the optical fiber coupler can be conveniently integrated into other optical devices, miniaturization of the optical device can be achieved, six degrees of freedom can be flexibly and stably adjusted, and the fine-pitch precise fine-thread adjusting screw is matched with the compression spring, so that the stability of