Provided is a safety and intelligent parking braking device. An iron bar with an electromagnetic coil is installed below a parking brake in the safety and intelligent parking braking device, in a power-losing state of the electromagnet coil, the iron bar can pop up to abut against a parking brake rod, the electromagnetic coil, a safety belt buckle and a relay normally-open point are in the same loop, after a driver switches on a power supply in a vehicle, if exhaled air contains alcohol molecules, an alcohol sensor sends a signal into a single chip microcomputer through a serial port, the single chip microcomputer outputs a low level at a P2.5 end through signal processing, a relay coil is not energized at this time, and therefore the relay normally-open point is not closed; meanwhile, a P2.1 end of the single chip microcomputer outputs a high level to drive a buzzer to send out an alarm sound, the loop is not switched on at this time, the electromagnetic coil is not energized, and the parking brake can not be put down. If the driver does not wear a safety belt, that is to say, the safety belt buckle is not energized, the electromagnetic coil is not energized, so that the parking brake can not be put down. By means of the safety and intelligent parking braking device, illegal activities such as drunk driving and driving without wearing the safety belt can be effectively prevented from occurring.