The invention discloses an oat and rice flour 3D printing food material, and belongs to the field of 3D printing materials. The oat and rice flour 3D printing food material is prepared from, by weight, 60-70 parts of rice flour, 10-15 parts of oat powder, 10-15 parts of water, 8-10 parts of fresh milk, 3-5 parts of buckwheat flour, 3-5 parts of vegetable oil, 2-3 parts of honey, 2-3 parts of xylitol, 2-3 parts of salt, 2-3 parts of maltodextrin, 2-3 parts of dietary fibers, 1-2 parts of emulgator and 0.1-0.2 part of essence. The low-sugar and low-fat raw materials are adopted, no chemical additive is included, pollution is avoided, and the material is healthier. Oat contains rich starch, protein, fat, B-group vitamin, nicotinic acid, folic acid, pantothenic acid, calcium, iron and other nutritional ingredients. 3D printing is adopted, diversified, individual and automatic manufacturing of products can be achieved, and the variety of the 3D printing food material is enriched. The nano rice flour is adopted, and therefore the process requirement of 3D printing can be met. The selenium-rich rice flour is adopted, therefore, the element selenium needed by the human body is supplemented, and the needs of different consumers are met.