The invention discloses a control system based on a car tire pressure device, and relates to the technical field of car safety systems. The control system based on the car tire pressure device includes a tire pressure detector and a central processor, the tire pressure detector includes a pressure sensor, a temperature sensor and a wireless transmitter; the pressure sensor and the temperature sensor are connected with the wireless transmitter by a data transmission circuit, the wireless transmitter is connected with the central processor by a central receiver, the central processor is respectively connected with a display and a loudspeaker by the data transmission circuit, the central processor controls an ignition system to work by a control circuit, and the central processor is connected with a mobile terminal through a communication module. The tire pressure detector detects car tire pressure, when the car tire pressure is too high or too low, the central processor controls the ignition system through the control circuit to prohibit car starting so as to protect personal safety and property safety of a driver.