This paper focuses on cosolvent and diluent to investigate the road performance of solvent-based cold-mix cold-lay asphalt mixture. The mix proportion design of the solvent-based cold-mix solution was conducted, and its workability and road performance were validated through relevant experiments. The results demonstrate that the workability and road performance of this cold-mix asphalt mixture can meet the technical requirements of hot-mix asphalt mixtures and satisfy the service requirements of asphalt pavements. Overall, the performance of the solvent-based cold-mix asphalt mixture is excellent, and the findings of this study can provide technical references for the application of cold-mix asphalt mixtures in engineering practice.