The study aimed to determine the level of social intelligence and its relation to the parental rearing styles for the students (10-12) in the public schools in Muscat Governorate, (270) students participated in the study and to achieve the objectives the student has used the descriptive approach and implemented two scales: Social Intelligence Scale by Ahmed Alghool (1993) and Parental Rearing Styles by Perris and his collogues (1980). The study shows that the level of social intelligence for the students in the classes (10 - 12) in Muscat Governorate was high. On the other hand the results showed that the most common parental rearing styles used by parents were the encouraging style, then comes the parental sympathy, then coaching to be better and finally tolerance style. The study also points to the direct relationship between the social intelligence and the following styles: (encouragement, parental sympathy and coaching to be better), whenever the parents use these styles more, the level of social intelligence of their children increases. On the other hand the social intelligence of the children decreases when the styles (deprivation, exclusion and blaming) are used. The study shows statistical differences between male and female students in the social intelligence came for the benefit of the female students. Also there are a statistical differences between male and female students in the parental styles in (Physical abuse, deprivation, cruelty, humiliation, rejection, blame, excessive interference, ostracism, pampering) for male students and the styles (encouragement and parents sympathy) for female students. The study also shows that there are statistical differences in variables for the grades (10 - 11 - 12) in regard to the social intelligence and these differences came in the benefit of the 11th grade. Results also showed differences for variables of the grades and variables of the parental styles for the 12th grade in the styles (Physical abuse, deprivation, cruelty, humiliation, rejection, blaming, parental sympathy and encouragement). The study recommends preparation of activities and training sessions assisting in developing the level of social intelligence for the students in schools and emphasizes the importance of designing coaching programs for the parents to develop their skills and methods of increasing their children's social intelligence.