The ultrasonic parking assistance system utilizes ultrasonic sensors to measure the distance of obstacles around the vehicle and provide real-time parking assistance information, making it easier for drivers to complete the parking process. The system adopts multiple ultrasonic sensors distributed in the front, back, left, and right directions of the vehicle (approximately 4-12 sensors) to provide comprehensive coverage, enabling drivers to have a clear understanding of the vehicle's surrounding environment and help them make correct parking decisions.