Riding auxiliary warning device

A riding auxiliary warning device adapted for being installed on a bicycle, the bicycle comprising a faucet and an end fixing component, and the riding auxiliary warning device comprising:

• a radar module, disposed on the end fixing component of the bicycle, wherein the radar module is adapted for detecting a rear-approaching vehicle and sending a trigger signal when a warning condition is reached between the detected rear-approaching vehicle and the bicycle;
• a camera module, disposed on the bicycle and electrically connected to the radar module, wherein the camera module is adapted for being in a sleep mode when the warning condition between the rear-approaching vehicle and the bicycle is not reached, and the camera module is adapted for being activated after receiving the trigger signal to take pictures of the rear-approaching vehicle and sending image information of the rear-approaching vehicle;
• and
• a display module, disposed on the faucet of the bicycle and electrically connected to the radar module and the camera module, wherein the display module comprises a screen, and the screen is adapted for at least displaying the image information of the rear-approaching vehicle.