This research aims to develop and evaluate the performance and efficiency of the seed cotton feeder-cleaner suit for small gins to reduce maintenance & downtime of the gin. The studied factors were four different feed rates ranged from 0.5, 0.75, 1.0 and 1.25 kg/min; Four different speeds of saw cleaning drum ranged from 3.32, 4.27, 5.22 and 6.17.m/s; Four different speeds of brush cleaning drum ranged from 5.32, 6.83, 8.39 and 9.87.m/s using seed cotton varieties of Giza 86 and Giza 94. The obtained results concluded that: The maximum productivity of the developed feeder /cleaner was 1.075 kg/h for cleaning Giza 86 variety compared to 1.115 kg/h for Giza 94 variety at the saw drum speed of 3.32 m/s, brush drum speed of 5.32 m/s and feed rate of 1.25 kg/min . The maximum values of cleaning efficiency of 89.60 and 94.30 % were obtained at the feed rate of 0.5 kg/min; saw drum speed of 6.17 m/s and brush speed of 9.87 m/s during cleaning seed cotton Giza 86 and Giza 94, respectively. The developed seed cotton feeder/cleaner produced better values of 2.5 and 50% span fiber length, uniformity ratio of length, reflectance of color and cotton fiber strength with seed cotton variety of Giza 94 compared to Giza 86.