The purpose of this study was to evaluate the effects of circuit training on selected physical fitness components of male students’ on Amdeworq secondary and preparatory school. Quasi experimental research design was used for this study. The researcher selected 30 secondary and preparatory school grade 12thmale students with age range between 17-19 years through simple random sampling method. This sample also grouped in to experimental (n=15) and control group (n=15) via randomization. The experimental group engaged in exercise program 3days per week for 40-60 minutes in three months, however, the control group did not perform circuit training program. The two groups took the test items included 12minute run test, 1miniut sit up, sit and reach tests as pre and post-test to measure cardiovascular endurance, muscular endurance and flexibility respectively. The data collected were analyzed by paired t-test to evaluate the significance difference (P<0.05) of pre and post-test results of each variable. After analysis the pre-post mean difference of each variable the experimental group cardiovascular endurance (MD=146.867), muscular endurance (MD=11.400) and flexibility (MD=4.300) were changed significantly (p < 0.05).Improved significantly. This was due to the effects of circuit training on selected health related physical fitness component.