The invention relates to a fused ring compound and a preparation method, application and intermediate compound thereof. The fused ring compound can be used as an inhibitor of phosphatidylinositol 3-kinase.本發明涉及一種稠環化合物、其製備方法和應用及其中間體化合物。該化合物可以用作磷脂醯肌醇3-激酶的抑制劑。