The fully-automatic high-precision suction nozzle detector can clearly inspect the internal blockage of the suction nozzle. Through the direct installation of cleaning tray, it can easily carry out inspection, photo preservation, adverse analysis and other powerful functions. Optical amplification and physical amplification can meet the detection of different types of suction nozzle after cleaning. Special backlight, adjustable backlight brightness, corresponding to different nozzles, unique mechanical positioning card design, each move is a position of the nozzle, convenient positioning when checking the nozzle, reducing the manual positioning operation of the complex lock.