The amount of fuel is an important component of the aviation fuel system, while measuring the fuel density is a key link in fuel quantity measurement. To further investigate the accuracy of aviation fuel density measurements to predict the future development of fuel measurements. This paper summarizes the main methods for measuring the fuel density, including the indirect method, hydrometer measurement, based on resonance technology measurement, a radioactive isotope measurement and ultrasonic measurement, analyzes basic principle of the methods, and compares their advantages and disadvantages, with current research points out the development trend of fuel measurement technology.