To consume their flesh and the juice, trimmed coconuts must be opened either manually or mechanically. As with trimming, manual opening requires the use of a large sharp knife, and physical strength and presents injury risks for the opener. Jarimopas and Kuson (2007) developed a young coconut fruit opening machine. The machine worked on the concept that opening was achieved by shearing the rotating trimmed young coconut by a stationary knife. The opening machine performance was attributed by the capacity of 30 s/fruit, juice spill-off of 2%, sawdust in juice of 0.2 g, diameter of circular opening of 58 mm. However, development of young coconut opening machine challenges the further development of the automatic young coconut fruit trimming machine to work better and faster than manual operators. Thus, the present research was aimed to develop an automatic young coconut fruit trimming machine which can process the fruit efficiently and quickly.