Driver while driving prone to visual fatigue and stall phenomena, at this time it is difficult to judge the safety car distance, easily lead to rear-end collision accident. In order to solve this problem, uses the ARM11 core SAMSUNG S3C6410 devices build a car safety distance monitoring system. Combine of vehicle features such as shape and texture, system uses multi-feature fusion technology to complete the vehicle identification under complex environment, uses the monocular vision principle complete the car distance detection with the camera under multi-angle. The experiments show that this system can effective monitoring the front cars distance, accurate measurement, high reliability and meet the requirements of real-time.