Abstract: Abstract: Modern agricultural park is an advanced production model, and high efficient land utilization is regarded as the key to break through the bottleneck of the park resources to realize the transformation and upgrading of the park and as an effective way to promote agricultural modernization. This study proposed a modern agricultural park designing system with the high efficient land utilization as the core, based on the analysis of China's land use issues on modern agricultural parks, the definition of the concept of the high efficient land use including the alternative of technology for land, maximizing the comprehensive benefits and the optimization of the spatial allocation. The system clears out the general designing idea of the modern agricultural park with the high efficient land use as the core, and points out that its designing goals include longstanding and increasing producing and supplying capability of the food and other agricultural product, promoting the land utilization rate by intensive input of elements of technology and capital, realizing the comprehensive benefits optimization and resource sustainability. The principles should follow the economical intensiveness, co-ordination of supply and demand, emphasis on quality and quantity, combination of use and protection, technological innovation and management, making overall plans and taking all factors into consideration. The approaches to realize the aim included:1）optimizing park land use spatial pattern and mode to increase the productivity of food and other agricultural products; 2) constructing industrial chains scientifically to create advantage and special industry to optimize the comprehensive benefits of the park; 3) exploring land potential to strengthen intensive input to promote land utilization efficiency; 4) establishing supportive mechanism to guarantee the sustainability of the land utilization efficiency. The system combined the ideas of resource economical intensive utilization, sustainability, circular economy, industrial economy, system engineering to build a theoretical of integrated design of "resource-industry-technology" and covered the designing thought, goal, principles and realizing approaches, which was the basic principle and technology instructional system to realize the high land utilization efficiency of the China's agricultural park. The Dongying Modern Agricultural Park that was designed and constructed based on the system had realized the spatial pattern of "One City Four Parks" and high land utilization efficiency of "One Platform, Six Specialty Industries, and Three Supportive Systems ". After 3-year construction from 2012-2014, the designing scheme had realized outstanding economic, biological and social benefits. The area of the park was 8303 hm2, with output of the unit land area increasing from 12124 Yuan/hm2 in 2011 to 71540 Yuan/hm2 in 2014 by 36372 Yuan/hm2, with annual average increase of 12124 Yuan/ hm2. The actual benefit increased by 1.7 times from 5275 to 14308 Yuan/hm2. The soil organic matter content increased by 0.2% compared with the period before the construction of the park. The effective utilization coefficient of agricultural irrigation water increased from 0.55 to 0.7 and comprehensive utilization of agricultural waste from 55% to over 85%, and agricultural commercialization rate from 45% to 95% with more employment and income increase of the employees. It showed that the designing system with the high land utilization efficiency as the core promoted in the study can effectively guide the construction of the modern agricultural park and protect the ecological environment at the same time of economical intensiveness of the land use to optimize the comprehensive benefits. However, the system has not yet applied to the other areas besides the Dongying Park and its benefits have not yet been compared with those of others. Besides, the study compares its comprehensive benefits of the Dongying Modern Agricultural Park with regular approaches rather than the energy-based analysis, which should be conducted in future studies.