An experimental study was carried out on the manufacture of the pelletized green feeds from such protein-rich greens as acacia, alfalfa, arrowroot and clover, etc. which occur abundantly throughout the country. A minimum extrusion pressure on pelletizing greens was measured for fresh and dry samples of each greens by using a piston-type extruder. It was found that the minimum pressure measured was greater for dry greens than for fresh greens, e.g., it was fund to be 17㎏/㎠ for fresh acacia leaves, whereas 83㎏/㎠ for the dry leaves. The apparent specific volume of the pellet produced was found to be inversely proportional to the extrusion pressure applied to the greens, and at the ultimate high pressures the specific volume of the pellet approached to definite values characterized by the kind of greens. A small-scale screw-type extruder for the use of pelletizing greens was designed, fabricated and test-runned to obtain die and screw characteristics for the purpose of determining optimum operation conditions for the commercial-scale unit. Drying experiment was performed with fresh greens and pelletized fresh greens under constant drying condition at 8 different dry-bulb temperatures ranging from 85° to 280℃. It was observed at temperatures higher than 105℃ that the quality of the greens were severely affected as the drying proceeded and hence the further experiment was conducted at the temperature of 105℃. Drying characteristics of the pelletized greens were compared with those of un-pelletized fresh greens. It was experimentally found that linear relationships exist between drying rate and free moisture content for both fresh greens and pelletized greens, and the slopes of the straight lines so obtained for fresh greens appeared to be larger than those for palletized greens. The data obtained from the study were believed to be of value for the development of the small-scale and yet commercial green-feed pellet machine to be used at local farms where collection, transportation and handling of large amount of greens at one time does not seem to be very practical.