Abstract: Through experiment, the impacts of meteorological conditions on the contents of middle elements (Mg, Ca, S) and trace elements (Zn, Fe) for wheat leaves, stalks and grains, and yield are studied. The results show that the high CO₂ concentration and water stress are favorable to the accumulation of the 5 elements. High CO₂ concentration accompanying with high temperature will shorten the growth period and decrease the number of grains. Synthesizing the positive effect of middle and trace elements and the negative effect of yield, the amount of wheat supply will run short if the same trace elements as in normal meteorological condition are required.