Fall detection method and device

The embodiment of the invention provides a fall detection method and device, relates to the technical field of thermal imaging, and can improve the accuracy of fall detection. The method comprises the following steps: acquiring a thermal imaging image of an infrared detection area at the current moment; performing posture recognition on the thermal imaging image at the current moment to obtain a posture recognition result of the target human body in the infrared detection area at the current moment; if the posture recognition result of the target human body at the current moment is a prone posture, the posture change duration of the target human body is determined according to historical posture recognition records; the posture change duration of the target human body is used for indicating the duration of switching the target human body from a sitting posture or a standing posture to a prone posture; and if the posture change duration of the target human body is less than or equal to a preset duration thresh