Phosphogypsum is the gypsum as a byproduct. It caused serious environment pollution. In this study, leaching As of phosphogypsum was studied by leaching equipment of self-made. We get some results of As heavy metals of the phosphogypsum affect the soil. The results show that: the content of arsenic is increasing and the pH of the soil is gradually decreased with the increasing of the leaching time. Different leaching velocity will cause different the content of arsenic of the soil.