Abstract:The standard steel tapes is the third grade line standards in the Verification Scheme of Line Measuring Instruments, and used for calibrating the tape-shaped working line measures. In order to ensure the consistency of measurement values of standard steel tape, and scientific evaluation of Calibration and Measurement Capabilities(CMC) of standard steel tape in China. the National Institute of Metrology as pilot laboratory organized the first national measurement comparison of standard steel tape. This paper introduces the basic situation, scheme and result of the comparison, analyzes the comparison results and all devices, studies the key technical problems and main error sources in the calibration of standard steel tape measure, and puts forward the method to solve the problems, so as to promote the calibration ability of standard steel tape measure.