Abstract: Influence of recycled ceramic aggregates on drying shrinkage of mortar was researched by comparison test on drying shrinkage of mortar with different aggregates. Based on orthogonal trial, the factors influencing the drying shrinkage of mortar, such as the recycled ceramic coarse sand replacement ratio, the water-binder ratio and the fly ash replacement ratio, were investigated. The results indicate that the recycled ceramic aggregates can reduce dry shrinkage effectively. The recycled ceramic coarse sand replacement ratio is a major factor influencing drying shrinkage of mortar. The fly ash replacement ratio has greater influences on the drying shrinkage of mortar at early stage(≤7d), and the influence becomes smaller after 7d. And it has the most important influence on the drying shrinkage of mortar when the fly ash replacement ratio is 10%.