The experiments were conducted to investigate the effect of sandy soils amendment with fly ash and polyacrylamide (PAM) on corn growth. The experimental design factors included three fly ash application rates (weight percent of sandy soil was 0%, 5%, 10%, and 15%, respectively) and three PAM application rates (0, 60, and 120 mg/kg). Treatment added neither fly ash nor PAM was used as control treatment. The results indicated that fly ash and PAM could promote the growth of corn leaves and restrain the height of corn. The corn yield of the sandy soil amended with 5% fly ash was increased by 9% than that of the control. However, higher fly ash application rates (10% and 15%) led to a decrease in corn yield, maximum 21% compared with the control. The combination of fly ash and PAM could reduce the negative effect of fly ash at a high application rate on corn yield. There was no significant effect on germination when fly ash was applied at 5% rate in sandy soil. The utilization of fly ash at 10% or 15% rate could postpone and decrease germination rate, which could be improved by the addition of PAM. The application of PAM would add nitrogen content in the fly ash-amended soil. 