Quality monitoring method and monitoring system for false-twisted yarn

The invention relates to a quality monitoring method and monitoring system for false-twisted yarns. The monitoring system comprises a rotating speed sensor and a central display control unit. A rotating speed sensor is used for collecting rotating speed signals of all false twisting needles in real time, a central display control unit judges whether the rotating speed corresponding to the rotating speed signals meets a preset condition or not, if not, false twisting yarn corresponding to the false twisting needles is cut off, and then based on the corresponding relation between the rotating speed of the false twisting needles and the quality of the false twisting yarn, by monitoring the rotating speed of the false twisting needle in real time, the quality of the false twisting yarn can be monitored in real time, the monitoring quality is accurate, when the rotating speed does not meet the preset condition, the false twisting yarn corresponding to the false twisting needle is cut off in time, spindle stopping