Through the field cultivation experiments of three kinds of rice under three machine transplanting methods which were pliable tray-seedling and machine transplant (PLMT), pot tray-seedling and machine scattering transplanting (POMST) and pot tray-seedling and machine transplanting (POMT), respectively, the main growth characteristics and trends of rice population were studied and analyzed. The results show that the seedling in POMST and POMT were healthy, revived and tillered early and fast after transplant; POMT had the advantage over PLMT and POMST, which resulted in the rice population growth better.