The work aims to solve the problems of poor conductivity, high cost and narrow application range of single filler conductive ink, and prepare composite carbon nanocomposite conductive ink by mixing carbon nanotubes, graphite and carbon black, and apply the ink to the development of press-touch printed electronic devices, and study its application efficiency in printed electronics. The influence of mass fraction ratio and grinding time of composite fillers on the sheet resistance of ink was investigated, and the optimal formula of ink was determined by comparative experiment.Based on the preferred ink, an architecture and interaction mode of press-touch electronic device which could realize multi-point recognition was presented.The hardware and software design of the press contact recognition function was designed, and paper-based coding circuit was manufactured combined with screen printing technology, to test the surface state and conductivity of the ink on the paper-based circuit, as well as the recognition accuracy and stability of the device.When the mass fraction of carbon nanotubes, graphite and carbon black was 4.1%, 3.0% and 10.2%, respectively, the sheet resistance of the ink reached 29 Ω/sq, and the resistance range of the paper-based circuit was 4.02~12.95 kΩ.The device could meet the pressure contact requirements of single click and double click, and can achieve 100% recognition accuracy of single point and combined point, and could work stably after 1 000 times of pressure loading and unloading.The preparation of carbon nanocomposite conductive ink makes up for the deficiency of the single filler ink and effectively improves the electrical conductivity of the ink. The press-touch printed electronic device developed with the ink can realize accurate recognition and correct voice interaction of different point and mode press-touch signals.