Wearable fall-down detection device and fall-down detection system

The invention discloses a wearable fall-down detection device worn on the wrist of the human body. The device comprises a detection system, a control module and a positioning communication module; thedetection system is used for detecting human-body wrist height parameters, human-body physiological signal parameters and wrist position and posture parameters in real time and transmitting the human-body wrist height parameters, the human-body physiological signal parameters and the wrist position and posture parameters to the control module; the control module is used for obtaining the human-body wrist height parameters, the human-body physiological signal parameters and the wrist position and posture parameters for fall-down judgement, generating fall-down information when it is determinedthat a user falls down, and issuing a communication instruction to the positioning communication module, wherein the human-body wrist height parameters, the human-body physiological signal parametersand the wrist position and