The invention belongs to the field of a food convenient powdery cake, and particularly relates to a food additives-free low-aluminum ion convenient powdery cake and a preparation method of the food additives-free low-aluminum ion convenient powdery cake. The convenient powdery cake is characterized in that the formula comprises the following components based on parts by weight: 97-99.5 parts of corn starch, 0.5-3.0 parts of salad oil and 35.9-39.5 parts of water. The preparation method comprises the following steps of: selecting raw materials, cleaning, stirring, curing, leaking powder, aging in a freezing way, washing powed, drying, and packing in a sterilization way. Food additives are not added into a preparation process of the convenient powdery cake provided by the invention, and the raw materials are selected and processing technological parameters are reasonably set, so that the powder opening can be smoothly implemented in the process of processing, the content of aluminum ions in the finished powdery cake can be reduced to be less than 10ppm, the implementation of the production technology can be further guaranteed, and the safe and healthy convenient powdery cake can be prepared.