A method and apparatus for determining quality of a physiological signal, relating to the field of wearable devices, capable of providing the accuracy of the result of determining the quality of the physiological signal and reducing the calculated amount in the process of determining the quality of the physiological signal. The specific solution is: S301, collecting physiological signals, the physiological signals being periodic signals or quasi-periodic signals； S302, extracting feature points of the physiological signals, the feature points comprising a feature point for indicating the period of the physiological signals； S303, dividing the period of the physiological signals according to the feature points of the physiological signals； and S304, determining the quality of signals of the ith period according to the similarity between the signals of the ith period and a current signal template set, wherein the signal template set comprises N signal templates, the N signal templates are obtained according to the physiological signals prior to the signals of the ith period, N is greater than or equal to 2, and i is greater than or equal to N. The method and apparatus is used in the process of determining the quality of physiological signals before obtaining human body physiological information according to the physiological signals of human body.L'invention concerne un procédé et un appareil pour déterminer la qualité d'un signal physiologique, se rapportant au domaine des dispositifs pouvant être portés, capables de garantir la précision du résultat de détermination de la qualité du signal physiologique et de réduire la quantité calculée dans le processus de détermination de la qualité du signal physiologique. La solution spécifique consiste à : S301, collecter des signaux physiologiques, les signaux physiologiques étant des signaux périodiques ou des signaux quasi-périodiques； S302, extraire des points caractéristiques des signaux physiologiques, les points caracté
