<p>Phosphogypsum (PG) is a typical by-product of producing phosphoric acid using wet process sulfuric acid, and contains organic matter, heavy metals, and fluoride as its primary impurities. However, it is rich in plant-available elements such as P and K, making it an ideal soil amendment. In the process of agricultural production, agricultural organic solid waste also poses a threat to the environment, while affecting the process of building a beautiful countryside. Traditional agricultural organic solid waste treatment methods, including landfill disposal and incineration, are resource wasteful and polluting. Landfilling could trigger geological collapse, while incineration caused atmospheric pollution and forest fires. The co-utilization of PG and organic solid waste co-pyrolyzing the mixture to produce organic nutrient-rich soil was explored by mixing corn straw and PG. This study investigated the leaching toxicity and available element content of the pyrolysis products at different temperatures, ratios, and times. The experimental results found that co-pyrolysis achieved the solidification and stabilization of harmful elements, the maximum release of plant usable forms elements under conditions of biomass addition of 20%, pyrolysis at 900℃ for 1&#xa0;h. This study provides a new direction for solid waste co-resource treatment, which can effectively alleviate the environmental pollution issues associated with inorganic and organic solid waste.</p> Graphical Abstract <p></p>