To solve the problem that it is difficult to measure the aircraft sortie rate under the condition of “no engine stopping”, a simulation measurement method based on Hierarchical Timed Colored Petri Net (HTCPN) is proposed to measure the aircraft sortie rate.Firstly, based on the aircraft maintenance work at the grassroots level, a continuous sortie model and the maintenance process are established.Secondly, Petri net theory and CPN tools software are used to construct the computer simulation model of the whole process of maintenance support based on HTCPN.Finally, the key factors that restrict the sortie rate of aircraft are identified through an analysis of calculation cases.The results show that the proposed method can not only find out the key factors affecting aircraft sortie, but also provide technical support for the measurement of aircraft sortie rates, which has certain value in engineering applications.