The invention provides a lens coupling device for multi-channel single-mode COB modules, including a lens feeding assembly, a lens fixture assembly, a PCB clamping assembly, a dispensing module, a curing module and a visual detection module; Multiple lenses are installed, and the lenses are loaded sequentially. The lens fixture assembly clamps and moves the lens loaded by the lens loading assembly to the corresponding packaging position on the PCB, and couples with the light-emitting element and the receiving element on the PCB. The PCB is fixed by the PCB. The clamping component is clamped and fixed, the dispensing module dispenses glue to the coupled lens, the curing module cures the dispensed lens, and the visual inspection module is used for visual inspection of the lens feeding and coupling process. The lens of the present invention adopts the method of automatic feeding, and is successively clamped to the surface of the PCB board by the lens clamping components, and is automatically coupled, glued and cured one by one. efficiency, precision and package quality.