Multifunction vehicle backing monitor

The utility model provides a multi-function vehicle backing monitor, which comprises a distance measuring sensor, a camera sensor, a control box and a monitoring screen. The utility model is characterized in that an ultrasonic emission receiving circuit in the control box transmits signals measured by the distance measuring sensor to a character information interface circuit through a single chip computer control circuit, and then, the signals are converted into character signals to be displayed on the monitoring screen; the combination of graphics and characters, sound and light into a whole is realized. The character information interface circuit is composed of a dot frequency signal generating circuit, a dot frequency signal line counting circuit, a field counting circuit for scanning the number of lines, a loaded pulse generating circuit, a video signal generating circuit, a display data input circuit, a line synchronization input circuit and a field synchronization input circuit.