The invention discloses a multifunctional intelligent anti-collision device of an automobile. The device comprises an air bag, anti-collision detecting units and an anti-collision controller. The anti-collision detecting unit comprises a front camera, a head ultrasonic distance measurement sensor, a rear camera, a tail ultrasonic distance measurement sensor, an infrared human detection sensor, an automobile speed sensor and an acceleration sensor. The anti-collision controller comprises a DSP digital signal processor, a voltage conversion circuit module, a touch liquid crystal display, a Flash memory, a USB communication circuit, a GPRS wireless communication module, a clock circuit module, a signal conditioning circuit, a voice play circuit and a relay. The multifunctional intelligent anti-collision device of the automobile is simple in structure, reasonable in design, convenient to use and operate, capable of avoiding accidents such as reversing collision, collision with an obstacle ahead due to acceleration, collision with a rear obstacle due to emergency braking, secondary collision after a car accident and the like, complete in functions, high in working stability and reliability, high in practicality and convenient to popularize and use.