The aim of this study is using of easier method of Fast-acting analogues of subcutaneous insulin to spending less, shorter hospital stay, no need to ICU care and better control of blood sugar, reduce diabetes complications and improve patients. All people with known diabetes type1 with following Criterion, participate in our study: blood sugar≥300mg/d, PH < 3/7, urine keton≥ +2 analysis, history of polydipsia, Frequenc, Enuresis, weight loss. determination of severity of DKA is according to PH: mild:PH=7.2 - 7.3, Mod: PH=7.1-7.2, severe: PH<7.1. exclusion criteria is: DKA caused by infections. patients with epilepcy or underline disease.patients with metabolic acidosis that treated with intra venous bicarbonate. patients become worse. 44 people 1 to 18 y are enrolled. After taking the content all patients by double blind method are divided in two groups, case and control. in control group, patients treat with Milwaukee method : Determination of dehydration, then treatment with Normal saline serum and from second hour insulin should be use. in case group, severity of dehydration estimates in patient with mild and mod DKA and treat.then aspart insulin(0/1 iu/kg) use, subcutaneous every 2 hours. Electrolysis imbalance, hypoglycemia, loss of consciousness and brain edema are Consequenceses.