The invention discloses seoiolite printing gum. The seoiolite printing gum is prepared from 1-90 parts by weight of sepiolite and 1-99 parts by weight of sodium alginate, totaling 100 parts by weight. The invention further discloses sepiolite printing paste. The sepiolite printing paste is prepared from the seoiolite printing gum, reactive brilliant blue KN-R, urea, sodium carbonate, a reserve salt S and water. The invention further discloses preparation methods and applications of the seoiolite printing gum and the sepiolite printing paste. The technology has a remarkable cost advantage and high product performance, and has contribution to enterprise environment protection.