Based on basic theory of Diamond Model, this paper analyzes the competitive power of Zhengzhou urban agriculture from production factors, demand conditions, related and supporting industries, business strategies and structure, and horizontal competition. In line with these situations, it introduces that the cluster development is an effective approach to lifting competitive power of Zhengzhou urban agriculture. Finally, it presents following countermeasures and suggestions: optimize spatial distribution for cluster development of urban agriculture; cultivate leading enterprises and optimize organizational form of urban agriculture; energetically develop low-carbon agriculture to create favorable ecological environment for cluster development of urban agriculture.