Background: Type 1 diabetes in children is a condition in which your child's body no longer produces an important hormone (insulin). Your child needs insulin to survive, so you'll have to replace the missing insulin. Type 1 diabetes in children used to be known as juvenile diabetes or insulin-dependent diabetes. The diagnosis of type 1 diabetes in children can be overwhelming at first, suddenly. Type 1 diabetes in children requires consistent care. Diabetes mellitus is a greatly predominant chronic disease. Type 1 diabetes mellitus often improves through the first stage of life and may influence the goodness of healthy adolescents. Type 1 diabetes may current at any age, but great generally does, therefore, among the age of 5 years and puberty. The diagnosis is proposed by beginning in childhood or early adult life or fast onset with early demand for insulin, the reported death rate from diabetes for children under 15 years of age was 1.3/100,000/year in the U.S. Kingdom of Saudi Arabia supporting more than 33.3 million people, about 35,000 children, and adolescents suffer fromT1DM, which makes Saudi Arabia ranked the 8th in terms of numbers and 4th country in the world in terms of the incidence rate (33.5 per 100,000 people) of TIDM. Self-care supported that the daily routine of insulin, nutrition, and blood testing is preserved. Aim of this study is to help the child , parent and the staff knowledge of what to do and why it is, therefore, significant for the child or young person's safety and happiness to project in place to cover cases that may happen in school. Methodology: Cross-sectional design was adopted in the present study were collected in diabetes clinics in Descriptive study. The present study was conducted at primary and scenery school governmental & private. The sample (200) practitioners from school governmental & private they used questionnaire. Results our participants were noticed between age group 30-40 years , the majority of participants female's gender was (77.50%) , The awareness role of the Health Authority in the Kingdom for this disease is very weak, the majority of our participants were noticed average was (55.00%) and weak knowledge (32.50%) and high was (12.50%) with a statistically significance P-value (<0.001) and Chi-square(54.250).Conclusion: The danger of delayed complexities of diabetes excess with accumulative exposure to high blood glucose levels and therapy that going back to circulating glucose to near-normal levels keeping versus these long-run complexities. Prospects for future treatment involved early protection or stem cell transplantation, renewal of surviving beta cells and gene therapy. Recommendations: Reinforcement of the knowledge was given through this research is fundamental to elevating sustained behaviour alteration in the society there is needed to increase in research on T1DM in Saudi Arabia.