With the development of aviation industry, the innovation of power system is particularly concerned, and the hybrid electric propulsion system technology has great potential for development. We develop a set of hybrid electric propulsion system upper computer, which is able to control the hybrid propulsion system and monitor the parameters of the hybrid propulsion system. The upper computer of hybrid propulsion system is designed based on LabVIEW, which covers the interface design and function design, and realizes the effect of command issuance, parameter observation, data preservation; The upper computer was virtually tested by Simulink simulation model, which realized that the upper computer receives and displays the generator power, battery power, load power, direct current(DC) bus voltage and state of charge(SOC) of the battery of the simulation model; The upper computer was tested by the motor experiment platform, and the speed command can be set by the upper computer and the q-axis current, d-axis current and speed of the motor can be monitored; Based on the two tests mentioned above, the data interaction, data processing and data preservation can be realized by the upper computer system, which validates the reliability of the upper computer. Thus, the upper computer shows good functionality and stability, which satisfies the application requirements of hybrid propulsion system in the engineering project.