In recent years, the Chinese government has recognized the important role of urban green space, and each province has formulated corresponding policies to increase the area of green space. However, China’s urban land development faces problems such as insufficient preliminary research, disorganized construction management, and chaotic organization and management. These problems are also reflected in urban garden projects. Compared with developed countries, China’s urban garden engineering technology and management in the modern sense are relatively backward. The study takes the garden engineering project management as a comprehensive research subject, and elaborates on it from two perspectives, which are project management content and quota design method. First, based on the Plan-Do-Check-Act (PDCA) cycle, a standardized management system with cost management, progress management, quality management and safety management as the main content is constructed. Then, the limit design method is developed utilizing multiple linear regression analysis. Finally, the limit design method is tested. The test results show that the limit design scheme proposed in the study can optimize the traditional limit design scheme by 53.34%. The quota design methods were evaluated, and the 10 sample items received a score range of 38.22 to 86.09 points, with an average score of 62.36 points. There are six projects with scores above 60 and 4 projects with scores below 60. This verifies that the quota design is reasonable. In terms of theory, the research combines the current laws and regulations and the administrative management system to construct a complete urban landscape engineering management system, which can provide a reference for solving the existing problems in the current urban landscape engineering management. In practice, although the proposed limit design method has a prediction error of 7.84%, it is still less than 10% of the legal ceiling. In engineering practice, it can effectively strengthen construction management and organizational management. Overall, the study proposes to build a standardized management system based on the PDCA cycle, with cost management, schedule management, quality management, and safety management as the main contents. The limited design method constructed using multiple linear regression analysis has effectiveness and practicality.