The utility model discloses a drunk-driving preventive infrared intelligent monitoring system on the basis of a single chip microcomputer. The drunk-driving preventive infrared intelligent monitoring system comprises the single chip microcomputer, an alcohol sensor, an infrared sensor, a pressure sensor, a brake circuit of an engine and a liquid crystal display screen. The alcohol sensor and the pressure sensor are respectively connected with the single chip microcomputer by A/D (analog/digital) converters of the alcohol sensor and the pressure sensor, the infrared sensor, the brake circuit of the engine and the liquid crystal display screen are connected with the single chip microcomputer, and the pressure sensor is arranged on a driver's seat. The drunk-driving preventive infrared intelligent monitoring system has the advantages that the problem that another person takes an alcohol test for a driver can be effectively solved, and tests for a driver are prevented from being affected by alcohol drinking of passengers.