The invention belongs to the field of early warning technologies for view dead zones of vehicles, and discloses a vehicle-mounted device and method for sharing pedestrian emergence information. The device for sharing the pedestrian emergence information comprises a vehicle, a first microwave sensor, a second microwave sensor, a display screen, a vehicle-mounted CAN bus, a data processing unit and a vehicle speed sensor, wherein the first microwave sensor is fixed to the center of the front end of the outer side of the vehicle, the second microwave sensor is fixed to the center of the rear end of the outer side of the vehicle, the display screen is arranged at the rear end of the outer side of the vehicle, the vehicle-mounted CAN bus is arranged on the vehicle, the data processing unit is arranged on the vehicle, the vehicle speed sensor is installed on a speed changer of the vehicle, the front side of the display screen is towards the rear of the vehicle, the vehicle speed sensor is electrically connected with the vehicle-mounted CAN bus, the signal input end of the data processing unit is electrically connected with the first microwave sensor, the second microwave sensor and the vehicle-mounted CAN bus, and the data processing unit is electrically connected with the display screen.