In this study, the representative crops of South China, East China, Central China, Southwest, Northwest and Northeast China were selected to study the effect of different inhibitors on crop yield and yield by using field test methods. The results showed that the suitable dosage of inhibitors for tea and longan in North China was 7.5‰and 8‰, respectively, and the yield increases was 6.94% and 24.92%, respectively. The suitable dosage of inhibitors for winter wheat, summer maize and spring flowering in East China was 6‰, 7‰ and 5‰, respectively, and the yield increases was 14.30%, 10.98% and 12.17%. The suitable dosage of rice inhibitor in Central China was 12‰,and the yield increase was 8.74%. The suitable dosage of inhibitors for Chinese rose and carnation planted in southwest China was 7‰ and 8‰, respectively, and the yield increases was 16.67% and 12.10%, respectively. The suitable dosage of inhibitors for apple and winter wheat in northwest China were both 7‰, and the yield increases was 27.83% and 3.63%, respectively. The suitable dosage of inhibitors for spring maize in northwest China was 5‰ and the yield increase was 1.97%. The suitable dosage of inhibitors for maize in the northeast China was 9‰ and the yield increase was 7.67%. In general, the yield increasing effect of inhibitors on the grain crops（maize and wheat） in Northwest China is weaker than that in other regions, and the recommended dosage of inhibitors in paddy field（12‰） is higher than that in dry land（5‰-9‰）. Above all, it is clear that the inhibitor has evident growth promotion effect on plants in all regions of China, which has significant effect on yield increasing and fertilizer saving.