By constructing a comprehensive evaluation index system of balanced development subsystem and full development subsystem, the balanced and full development of China's provinces from 2008 to 2019 is statistically measured with the order-coupling-coordination model. The results show that China's provincial balanced development and full development have been significantly improved, and the average degree of order of balanced development and full development has increased by 0.122 and 0.1 respectively. The two subsystems are comprehensively coordinated and highly coupled, making the index of balanced and full development rise from 0.650 to 0.732, and jointly promoting the economic society to move in the balanced and full development direction. The nuclear density distribution curve shows that the provinces with unbalanced and inadequate development are decreasing. The spatial evolution shows that the balanced full development exists in the diffusion process from the Yangtze River Delta to the periphery.