The study aims at using of diluted low fat milk with concentrations (1: 4, 1: 6, 1: 8 water: milk) (volume: volume), with 50 g eggs, for four replicates for each treatment of the experiment treatments to remove the adhesive substance from egg’s surface of carp fish (Cyprinus carpio L.) to increase the percentage of fertilization and hatching. The results of the statistical analysis of the study show that the treatment (T3), with concentration of (1: 6 water: milk) records significant differences at the level of (P> 0.01) for the percentage of fertilization which amounts (77%) on the control treatment and other treatments. It shows superiority with significant differences to the two traits: the average period of removing adhesive substance from the eggs per (min) and the average percentage of hatching which amounts (65.75 min, 81.5%), respectively. As well as shortens incubation period for the eggs (the time required for hatching eggs), which has been observed during the period of monitoring the eggs incubation. Thus, treatment (T3) shows its superiority on the control treatment and other used treatments in the experiment to remove the adhesive substance from common carp fish eggs during the artificial reproduction process in the hatcheries.