Remanufacturing technology is geared to resource saving and sustainable development．In this article, diode laser and its application in remanufacturing are introduced, and the obstacles against this application as well as the development trend of diode laser remanufacturing system are analyzed. Diode laser is fit to join into low-consumption and flexible laser remanufacturing system for its high electrical-to-optical conversion efficiency, small mass and body, and high absorption by metal. High-power diode laser units have been delivered to customer and are working for remanufacturing at home and abroad. Recently, the mobile diode laser remanufacturing equipment with a robot has also come into application. It is thought that the key to optical shaping and coupling will be found, and the obstacles against cladding with the appropriate materials on a variety of worn components will also be surmounted. Moreover, the robot technology relevant to diode laser remanufacturing is advancing, and the detection and control system for laser remanufacturing process is being developed. It is certain that components with any size, any shape and any material will be well remanufactured with diode laser in the further.