Abstract: In order to measure the powder flow,a measurement system of powder flow in laser remanufacturing technology was designed.The variance of the powder flow was detected with a capacitance sensor and with 2Cr13 and H13 metal powder as transmission medium,experiments were carried out.The results show that a smaller solution can be obtained if the change of powder density is larger than 10-1g/min with H13 metal powder as medium.The system can be used to measure powder flow.