Background: Complete blood count is used to determine the clinical grade of Dengue Hemorrhagic Fever. Blood test done to determine leukocyte count, thrombocyte count and hematocrit levels.the result of complete blood count is expected to assist medical officers to deal with Dengue Hemorrhagic Fever according to the clinical grade. Aim: To determine the correlation beetwen leukocyte count, thrombocyte count and hematocrit levels with clinical grade of Dengue Hemorrhagic Fever. Methods: This was cross sectional retrospective research. Samples were taken from medical records of admitted to adult Dengue Hemorrhagic fever in Salatiga Hospital. Data that taken from medical records were age, sex, leukocyte count, thrombocyte count, hematocrit levels and clinical grade of Dengue Hemorrhagic Fever according to WHO 2011 criteria. The statistical analysis used descriptive and inferential analysis by using Rank Spearman correlation with SPSS computer program. Results: There are as many as 94 samples of Dengue Hemorrhagic Fever patients in Salatiga Hospital 2015. The analysis by spearman correlation found there was no significant correlation beetwen leukocyte count with clinical grade of Dengue Hemorrhagic fever ( Sig= 0,124 ; >0,05 and rho = -0,160), a significant correlation beetwen thrombocyte count with clinical grade of Dengue Hemorrhagic fever which means the lower the thrombocyte count the higher clinical grade of Dengue Hemorrhagic Fever ( Sig = 0,001 ; <0,05 and rho = -0,522**), no significant correlation beetwen hematocrit levels with clinical grade of Dengue Hemorrhagic fever ( Sig = 0,369 ; >0,05 and rho = -0,094). Conclusions: There was no significant correlation between leukocyte count with clinical grade of , a significant correlation between thrombocyte count with clinical grade of Dengue Hemorrhagic Fever so that the thrombocyte count may be considered to determine the clinical grade of Dengue Hemorrhagic fever. There was no significant correlation between hematocrit levels with clinical grade of Dengue Hemorrhagic Fever