Abstract: The general flight test bed is a major basic test facility that plays an important role in the development process of aircraft engines, and has unique advantages in altitude test. The differences between the general flight test bed and the altitude simulator are analyzed, as well as the new engine test subjects and contents that the general flight test bed can undertake. From multiple dimensions such as flight safety, carrier flight envelope, mounting capacity, and carrier source, the factors that need to be considered in the development of a general flight test bed are proposed. Based on the development of China′s general flight test bed capabilities, suggestions are proposed for overall planning, serialized development, and long-term sustained investment to form a serialized and large-scale general flight test bed and promote the development and development of China′s aviation engines.