RIDING AUXILIARY WARNING DEVICE

A riding auxiliary warning device (10) is adapted for being installed on a bicycle (20). The riding auxiliary warning device includes a radar module (12), a camera module (14), and a display module (16). The radar module is disposed on an end fixing component (24). The radar module is adapted for detecting a rear-approaching vehicle and sending a trigger signal when a warning condition is reached. The camera module is electrically connected to the radar module. When the warning condition is not reached, the camera module is in a sleep mode. The camera module is adapted for being activated after receiving the trigger signal to take pictures and send image information of the rear-approaching vehicle. The display module is disposed on a faucet (22) electrically connected to the radar module and the camera module. The display module includes a screen, and the screen is adapted for displaying the image information of the rear-approaching vehicle.