The invention discloses a method and apparatus for reminding a heart rate in the sleeping process and a wearable device comprising the apparatus. The method comprises: an acquisition step for acquiring a heart rate in the sleeping process of a user; a judgment step for judging relationships between the acquired heart rate and a preset heart rate threshold 1 as well as a preset heart rate threshold 2; a first reminding step for firstly giving reminding at a vibration level I to a user until reaching a preset vibration level, and keeping reminding at the preset vibration level; and a sending step for sending heart rate information to a WeChat official account or a mobile client APP (Application) bound with the user, and sending or not sending intervention-required information at a first level according to presetting. According to the method and apparatus for reminding the heart rate in the sleeping process and the wearable device, which are disclosed by the invention, when the user suffers from bradycardia, different types of reminding can be given according to the bradycardia process.