Abstract: In order to meet the application requirements of high strength composite rock bolt pultrusion molding, epoxy resin matrix cured by acid anhydride was developed. The rheological properties, curing properties of the resin matrix and mechanical properties of the casting body were studied, and the Arrhenius viscosity model was established to predict the viscosity characteristics of the resin. The results showed that the developed epoxy resin matrix has the advantages of low viscosity, long operation period and concentrated heat release in curing reaction. The tensile strength, elongation at break and bending strength of resin castable are 74.25 MPa, 4.48% and 127 MPa, respectively, which meet the requirements of high strength composite bolt pultrusion production process and performance. In addition, high strength glass fiber was selected to prepare 22 mm diameter full thread composite bolt, the tensile strength and transverse shear strength of bolt body reached 1027.3 MPa and 223.6 MPa, respectively, which meet the requirements of high strength composite rock bolt.