Abstract: To gain the burnup reactivity coefficient, the method of control rod bank calibration was used in the test of the measurement about the burnup reactivity coefficient of China Advanced Research Reactor (CARR) under full power operation. The purpose of the test was to gain the burnup reactivity coefficient as the original reference data and check the theoretical calculation result obtainned in the design stage. Two methods were used in the test, and both results of the test are negative and consistent. This satisfies the requirement of the acceptance criteria.