Abstract: Sulfate erosion is one of the typical threats to the durability of engineering structures. Through experiments, the sulfate erosion resistance performance of concrete specimens mixed with different mineral admixtures under different immersion modes and different corrosion ion types were studied. The sulfate erosion resistance performance was evaluated by measuring the corrosion resistance coefficient of concrete with different admixtures at different ages and different erosion conditions. The experimental results showed that magnesium ions in sulfate-eroded environment have greater damage effect on concrete, and the slag powder has higher activity, which can bring the pozzolanic effect into play earlier and make the concrete structure more dense. Compared with the concrete mixed with 30% fly powder, the concrete with 30% slag powder has better resistance to sulfate erosion. In the construction area with alternated dry and wet conditions, it is not suitable to add fly ash in the concrete. Appropriate amount of slag powder can be added to delay the erosion damage of concrete.