The impact of human aviation activities on the environment is becoming more and more oncerning. Passenger aircraft currently account for 2% of the world's CO2 emissions while consuming 13% of fossil fuel burn within the transportation sector. By the 2050s, the proportion of air travel contributing to climate change is forecast to reach 6-10%. Prioritizing environmental protection, green aviation refers to the use of new fuels such as bio-aviation oil in aircraft, the improvement of intelligent manufacturing processes of high-performance composite materials, the adoption of harmless or low-harm new technologies, together with the development and use of high-efficiency, low-pollution or pollution-free propulsion systems. This Special Issue will present research activities focused on the innovation of energy technologies and emission reduction technologies for multi-electric/all-electric aircraft, including electrical machines, power electronics, composite materials, propulsion architectures, as well as advanced manufacturing. .