The purpose of this study is to find out reasonable automatic silk reeling method of the domestic cocoons Jar the improvement of its reeling ability. The results obtained are as follows: 1. The silk yield and the reelability percentage decreased according to increase of the reeling velocity and decrease of the reeling temperature. 2. The reeling tension increased according to increase of the reeling velocity and decrease of the reeling temperature. 3. The reeling accidance increased according to i I1crease of the reeling velocity and temperature. 4. In case of the automatic silk reeling with fixed denier system, the reeling velocity (90∼120m/min) md temperature (35∼45$^{circ}C$) had no influence on the raw silk qualities. 5. As a conclusion, the reasonable reeling velocity is 3bout 120m per minutes and the bath temperature is about 40$^{circ}C$ in the automatic silk reeling of the domestic cocoons.