The invention provides a starch blended cellulose aerogel as well as preparation and application thereof. The cellulose aerogel is modified by utilizing starch, and the starch blended cellulose aerogel is prepared through high pressure homogeneous blending and vacuum freeze drying. Due to the strong hydrophilicity of the starch, the starch is copolymerized with cellulose whiskers after being micronized and aged, the performance of the cellulose aerogel is improved, cheap materials are fully used, the flow of the preparation process is simplified, and a rich source is provided for the improvement on comprehensive performance of a composite. Compared with the common cellulose aerogel, the starch blended cellulose aerogel has the advantages of small density, high porosity, small volume shrinkage, good oil absorption property, excellent dynamic viscoelasticity and the like.