Abstract: To study the growth characteristics of low-temperature ice crystals in aviation fuel moisture under different working conditions, a low-temperature icing model of aviation fuel was established based on the phase field theory, the heat and mass transfer equation and the energy conservation equation. The effects of water concentration, anisotropic strength and other parameters on the growth characteristics of ice crystals at different time instances were analyzed. The results show that, when the fuel water concentration is larger, the solid phase rate and dendrite diameter are also larger. With the increase of anisotropy strength, the diameter of ice crystals tends to increase, and eventually fluctuates slightly near a constant value. The environment has a significant effect on the morphology of ice crystals. When the ice crystal environment changes from air to fuel, the side branches of ice crystals no longer grow, while the size of ice crystals decreases accordingly. The solid phase rate of poly-crystals continues to increase with time, growing from 0.1584 at t = 4 to 0.2964 at t = 12, reaching an increasement of about 87.1%. Meanwhile, the larger the degree of subcooling, the faster the growth of the solid phase rate slows down. This research can provide references for the ice crystal growth mechanism in fuel environments and offer insights for engineering anti-icing and de-icing methods.