The present invention relates to a method of preparing instant dry puffing rice. The method of preparing instant dry puffing rice according to one embodiment of the present invention includes a step of dipping rice in wafer including sodium phosphate; a step of dehydrating the rice; a step of spraying oil to the rice; a step of treating the rice with vapor; and a step of drying the rice.본 발명은 인산나트륨 및 유화 유지로 전처리한 쌀을 증기로 증숙하고 건조시킨 후 팽화시켜 일반 미반과 식감이 유사한 복원력이 우수한 팽화 건조미에 관한 것이다.