The present invention relates to a manufacturing method of a rice cake product easy to store for a long period of time, wherein the manufacturing method of the rice cake product prevents outdoor air from flowing into the rice cake product by seal-packing the rice cake product in a packaging film and increases the storage period of the packed rice cake product by sterilizing the packed rice cake product with high-temperature water. The manufacturing method of the rice cake product comprises the steps of: putting a rice cake product produced by pounding rice or steaming rice into a film packaging machine which separately packs the rice cake product separately packing the rice cake product put into the film packaging machine by using a packaging film putting the packed rice cake product into a sterilizer to sterilize the packed rice cake product and packing the sterilized rice cake product in a form of goods for sales and distribution, followed by selling and distributing the rice cake product.COPYRIGHT KIPO 2015본 발명은 제조된 떡 제품을 필름포장재로 밀봉포장하여 외부의 공기가 유입되지 않도록 하고, 포장된 떡 제품을 고온의 물로 살균하여 떡 제품의 보관기간을 증가시켜 장기보관이 용이한 떡 제품 제조방법에 관한 것으로서, 쌀을 치거나 쪄서 생산된 떡 제품을 개별로 포장하는 필름포장 장치로 투입하는 단계와, 상기 필름포장 장치로 투입된 떡 제품을 필름포장재로 개별 포장하는 단계와, 상기 포장된 떡 제품을 살균장치에 투입하여 살균하는 단계와, 상기 살균된 떡 제품을 상품으로 포장하여 판매 및 유통하는 단계를 포함한다.