Abstract: In view of problems of low precision, high cost, trouble operation existed in calibration devices for mine-used flowmeters which simply use weighing method or standard meter method, the paper put forward a design scheme of calibration device for mine-used flowmeters which integrates weighing method and standard meter method together, namely using weighing method to calibrate standard meter regularly or flowmeter with high accuracy and using standard meter to calibrate flowmeter. The scheme not only retains advantages of reliability, stability, high accuracy of the weighting method, but also inherits features of high efficiency, non-frequent switch, long life of standard meter method, which ensures calibrating accuracy of the device.