With the development of information technology and the gradual popularization of the online litigation mode, the digital trial mode has had an impact on the traditional trial mode under the framework of the civil procedure law, which needs to be analyzed in depth to determine its impact and the effectiveness of its application. This study analyzes the impact of online litigation on the traditional trial mode under the framework of civil procedure law from a digital perspective. Through a combination of literature analysis, case study and questionnaire survey, it systematically examines the key problems of the trial mode under the framework of civil procedure law, explores the practical steps and application paths of online litigation, and empirically analyzes the effectiveness of the online litigation system in judicial services. The study found that after the implementation of the online litigation system in L courts, the success rate of paper service increased from 71.27% in 2017 to 90.25% in 2024, and the utilization rate of summary procedures increased from 75.19% to 92.07%. More than 208,670 times of various litigation materials were served through the online litigation system, saving more than 1.6 million yuan in service costs each year. The questionnaire survey showed that the user experience satisfaction ratings of the online litigation system by case judges and parties reached 4.61 and 4.70 respectively, and the study shows that the online litigation system has effectively enhanced judicial efficiency, saved judicial resources and improved user experience through digital transformation, but there is still room for improvement in terms of system stability and interface user-friendliness, etc. This study is helpful for promoting the digital transformation of civil litigation system. This study has important reference value for promoting the digital transformation of civil litigation and improving the online litigation mechanism.