A warning device for excessive neck bending includes: a neck brace, a control circuit, a distance detector and a transmitter； wherein the neck brace is provided for covering the neck of the human body； the control circuit is provided on the neck In the neck brace, it controls all actions； the distance detector is located in the neck brace and is electrically connected to the control circuit, which detects the distance after the neck is bent, and transmits the detected signal to The control circuit； the transmitter is located in the neck guard and is electrically connected to the control circuit, the control circuit can control the transmitter to issue an alarm； thereby, when the distance detector detects the neck bending distance Too large, that is, when the neck is excessively bent, the control circuit controls the transmitter to issue an alarm to warn the user to avoid neck injury.一種頸部過度彎曲警示器，包括有：一護頸套、一控制電路、一距離偵測器及一發報器；其中，該護頸套供套在人體頸部上；該控制電路設於該護頸套中，其控制所有之動作；該距離偵測器設於該護頸套中，與該控制電路電性連接，其偵測頸部彎曲後之距離，並將偵測之訊號傳予該控制電路；該發報器設於該護頸套中，與該控制電路電性連接，該控制電路可操控該發報器發出警報；藉此，當該距離偵測器偵測出頸部彎曲距離過大，即頸部過度彎曲時，該控制電路即操控該發報器發出警報，藉以警示使用者，以避免頸部之傷害。
