Abstract: In order to study the reliability of automatic driving performance tests of intelligent connected vehicles by using a closed test field, this study establishes 18 test conditions that conform to four typical test scenarios in a closed intelligent connected environment. The evaluation system of the intelligent connected vehicle test field is constructed by Analytic Hierarchy Process, and the weight coefficients corresponding to the 18 test conditions in the four typical test scenarios are calibrated by expert questionnaire method. The reliability evaluation method for the closed intelligent connected vehicle test field is then proposed by introducing the evaluation indexes such as vehicle saturation in tests, single test pass rate, comprehensive test pass rate and test reliability coefficient. Taking Da’an intelligent connected vehicle test field as the research object, the proposed evaluation method is verified based on some software for virtual scene construction and co-simulation, such as Prescan simulation, SketchUp 3D drawing and Matlab/Simulink modeling. The results show that the evaluation method has good applicability to the design improvement and test evaluation of closed test fields for intelligent connected vehicles. According to the evaluation results, the test vehicle can be guided to choose the appropriate field road, and the improvement measures and optimization suggestions can be put forward for the design and construction of the test field.