Abstract: Through long-term positioning experiments, the effect of long-term nutrient allocation in dry semi-humid areas on the yield of wheat and corn in double cropping dryland under different yield levels was studied. The results showed that: (1) Compared with the CK, there were no significant differences in the average corn yield and the annual average wheat+corn yield over the past 10 years. The average wheat yield was lower than the average corn yield. (2) Over the 10 years, wheat reached high yield levels in 4 years, stable yield levels in 3 years, low yield levels in 1 year, and extremely low yield levels in 2 years. Corn reached high yield levels in 3 years, stable yield levels in 3 years, low yield levels in 2 years, and extremely low yield levels in 1 year, with 1 year of complete crop failure. (3) At high yield levels, the wheat yield ranged from 5040.0 kg/hm² to 7380.0 kg/hm², and the corn yield ranged from 5697.5 kg/hm² to 9567.5 kg/hm². The differences in yield increase were not significant. At stable yield levels, the average wheat yield decreased with increasing fertilization rates, and the yield increase of corn reached an extremely significant level. (4) At low and extremely low yield levels, the average yields of wheat and corn decreased with increasing fertilization rates, with highly significant reductions. In conclusion, in semi-humid and drought-prone dryland areas, it is recommended to control the fertilization rate below 900 kg/hm² for long-term double cropping of wheat and corn. Due to the relatively sufficient potassium content in the soil of western Henan, potassium fertilizer can be applied every 3-5 years.