The invention provides unbleach pulp and a preparation technology and an application thereof, and relates to the field of straw pulping technologies. Raw materials of the unbleach pulp are extensivelyselected, and wheat grass, straw, reed straw and waste wood chips can be efficiently used as the pulping raw materials, so the pulping cost is remarkably reduced. The preparation technology for the unbleach pulp is capable of using a new technology to replace steam heating in an aspect of softening the raw materials, remarkably saving the heating cost, and solving a pulp black liquor problem existing in a pulping process. A production technology flow of the unbleach pulp is simplified, electricity and water are saved efficiently, a resource utilization rate is effectively improved, and wastewater and waste material are not generated in the production process. The special production technology is used for pulping, a beating degree is higher, the quality is better, and a pulping product isstable in performance. The unbleach pulp can be extensively applied to a functional degradable material. In the application fields of corrugated paper preparation, industrial packaging material preparation, sheet material preparation and tableware preparation, the functional applicability of the unbleach pulp and the material quality are remarkably reinforced.