The proposition of resource curse means the negative relationship between rich resource degree and economic growth. Many studies support this proposition, but an unstable relationship is proved by means of China’s city-level panel data. It is showed that when resource prices’ growth is high, the relationship between rich resource degree and economic growth is a positive correlation and the resource curse proposition is false. However, when resource prices’ growth is low, especially below zero, the relationship is a negative correlation and the resource curse proposition is true. So, if a city produces more resources, especially more ferrous metal or oil than others, it should strengthen the pricing power of local resources to promote economic growth.