Abstract: Objective To evaluate the accuracy and comparability of test parameters such as WBC,RBC,PLT,HCT,and MCV,detected with 10 different blood cell analyzers. Methods Verification test was performed each month to evaluate the accuracy and comparability of test parameters such as WBC,RBC,PLT,HCT,and MCV detected with 10 different blood cell analyzers.A blood cell analyzer was selected as the reference analyzer used in verification test.Fresh anti-coagulation blood was used to detect the test parameters at 5 levels and 10 tests were performed at each level.The average value of 10 tests was taken as the target value detected with several blood cell analyzers.Deviation error of the assessed and reference analyzers was calculated and judged whether it meets the revised criteria of US Clinical Laboratories（CLIA 88） and the standards established by NCCLS. Results The verification test showed that the parameters detected with blood cell analyzers were consistent with those detected with other devices.However,certain devices should be calibrated if their deviation error was out of the standard range. Conclusion Regular verification test can effectively control the accuracy of detected parameters when the device used has a good reproducibility and repeatability.