In this paper, neutral ionic liquid 1 - methyl - 3 - ethyl bromide imidazole [Emim]Br is synthesized. The effects of cooking temperature and time on pulping process are analyzed based on the pulp yield. It can be concluded that the cooking temperature 90-130℃ and cooking time 60 min are suitable for research of delignification reaction kinetics. The pulp yields steady at about 40%, which belongs to high yield chemical pulp. The physical properties of papersheet, which is prepared by ionic liquid cooking wheat pulping, satisfy the general requirements of paper. Kinetics experiments are carried out under the temperature 90℃, 100℃, 110℃, 120℃, 130℃ respectively. The results gives that delignification reaction kinetics of ionic liquid pulping process belongs to first order, its reaction activation energy is 57.938kJ·mol-1.