The main research directions include: (1) biomass resource chemistry; (2) Biorefining of plant polysaccharides; (3) The action mechanism of cellulase and xylanase; (4) Bioenergy conversion. In terms of teaching, he has undertaken the teaching of Principles of Chemical Engineering, Biochemistry Technology (bilingual) and Introduction to Forest Chemical Engineering for undergraduates majoring in forest chemical engineering, and currently directs 5 graduate students. Scientific research project supported by National Natural Science Foundation [1], the effect and mechanism of xylan in lignocellulosic materials on cellulase hydrolysis. [2] The operating funds of basic scientific research in central universities and the mechanism of xylanase degradation of lignocellulosic materials. [3] Shaanxi Provincial Natural Science Foundation, Study on the Mechanism of Hemicellulase Assisting Cellulase to Saccharify Crop Straw with Efficiency. [4] Shaanxi provincial science and technology plan project, research on key technologies of preparing liquid fuel from low-grade petroleum resources. [5] Northwest A&F University Young Academic Backbone Support Project, Basic Research on the Application of Hemicellulase. [6] National Natural Science Foundation, Study on Prebiotic Efficacy and Antibacterial Activity of Acid Xylo-oligosaccharides [7] Doctoral Research Start-up Fund of Northwest A&F University, and the representative academic papers on the application of xylo-oligosaccharides in ruminant production have been used as biofuels in biotechnology. Bioresource Technology and other journals published SCI papers 13, EI papers 2, Sun, *. Research progress in enzymatic hydrolysis of lignocellulose to produce fermentable sugar. Biomass Chemical Engineering, 2065,438+02,46 (3): 39-44. (Summary) Zhang Junhua, Xu Yong, Yongqiang, Bu Xiaoli, Yu Shiyuan. Isolation of xylobiose and xylotrisaccharide and their application in in vitro culture of Bifidobacterium. Forest Chemistry and Industry, 2005,25 (1):15-18. Patent [1] Zhang Junhua, Liu Jianjun, Kang Bowen. Bacillus subtilis and its application. Tian Dalin is from Guo Wentao. A surfactant-assisted extraction method of total flavonoids from Toona sinensis leaves [3] Zhang Hongjian,,, Qiu Rongqiang. A powdery wood adhesive and its preparation method.