PURPOSE: A method for manufacturing a disposable nutritious cereal composition is provided to be used as a snack and to obtain a tea function, a porridge function, and a soup function by mixing roasted and ground grains, corn flake cereals, and vegetable cream. CONSTITUTION: A method for manufacturing a disposable nutritious cereal composition comprises: a step of processing brown rice into 100-300 meshes by roasting the brown rice; a step of processing refined salt into 100-300 meshes; a step(4) of mixing 10-30 weight% of crushed corn flake cereal with 10-30 weight% of roasted grain powder, 27-20 weight% of vegetable cream, 20-10 w eight% of roasted germinated brown rice powder, 10-20 weight% of alpha corn, 1-5 weight% of stevioside, 1-10 weight% of sugar powder, and 1-5 weight% of salicornia herbacea powder or refined salt powder; a step(5) of making a mixed corn flake cereal composition by putting the mixture into a mixer, which rotates at 60-90 rpm, and mixing the mixture for 5-50 minutes; a step(6) of putting the mixed corn flake cereal composition into a high temperature flash sterilizer and sterilizing the mixture at 85-95°;C for 30-120 seconds; and a step(8) of putting the mixed corn flake cereal composition into a disposable stick packing device and packing the composition with a polyethylene film wrapping paper.본 발명은 일회용으로 소포장하여 물을 타는 양으로 차와 죽으로 만들어 대용식으로 먹을 수 있으며, 다음의 성분들을 함유하는 일회용 시리얼 조성물을 제공한다:(a) 가로 세로 10㎜ 이하 크기의 파쇄 콘플레이크 10 ~ 30중량%,(b) 100 ~ 300 메쉬 크기의 볶은 검은 쌀 분말, 울금 분말, 천마 분말, 율무 분말, 호박 분말, 고구마 분말, 감자 분말, 쌀 분말, 찹쌀 분말, 보리 분말, 밀 분말, 기리 분말, 메밀 분말, 콩 분말 중 선택되는 어느 하나의 곡물 분말 13 ~ 30중량%,(c) 식물성 크림 20 ~ 27중량%,(d) 100 ~ 300 메쉬 크기의 볶은 발아현미 분말 10 ~ 20중량%,(e) 알파 콘 10 ~ 20중량%,(f) 스테비오사이드 1 ~ 5중량%,(g) 설탕 분말 1 ~ 10중량%, 및(h) 함초 분말 또는 정제염 분말 1 ~ 5중량%.