Abstract: A prefabricated angle steel lattice concrete composite shear wall is proposed. This prefabricated component replaces the distributed steel reinforcement with a steel frame composed of angle steel and batten plates. This shear wall exhibits good fire resistance and corrosion resistance comparable to traditional concrete structures, while its on-site assembly process is similar to steel structures. Seismic performance of this composite shear wall was experimentally and numerically analyzed. And a corresponding hysteretic model was developed. The results show that the composite shear wall has good seismic performance. Under horizontal low cycle loading, the failure mode is compression-flexure failure, with hysteretic curves showing a bow-shaped or reverse “S” pattern. Stiffness degradation curves generally follow an inverse proportional function, and strength degradation does not change significantly with parameters. Enhancing ductility is achievable by reducing axial compression ratio or angle steel spacing, lowering steel strength, and increasing shear span ratio, thereby improving seismic performance. Increasing steel ratio of concealed columns positively affects bearing and deformation capacities, while stirrup ratio has minimal impact on seismic performance. The established hysteretic model is in good agreement with experimental hysteretic curves. It effectively reflects stiffness degradation, pinch effect and residual deformation, and meets engineering design requirements.