Recently, mirror-like surface is required for adding high quality on the most products. Polishing process is almost used for machining the mirror-like surface. However, when many workers make a large die and mold with the mirror-like surface in many machine shops, it is necessary for them to polish very long time. Therefore, in this paper, high speed polishing for large die or mild was developed and evaluated. The polishing system for large die and mold consists of the NC milling machine and the polishing tool using the several polishing units. And the polishing unit consists of polishing head, spring, shaft and linear guide. The polishing unit with no-chatter was firstly developed, and the optimum polishing condition for the unit was investigated in several experiments. The polishing tool was developed for a large die and mold by using the several polishing units. This system was evaluated for high speed polishing on the flat and curve surfaces of the large die. It is concluded from the results that (1) Mirror-like of large die and mold surface were machined by this polishing system, (2) The polishing time using this polishing system is one over three hundred than that of the conventional polishing.