The present invention relates to a kind of fused ring compound, preparation method and application and its midbody compounds. The compound may be used as the inhibitor of phosphatidyl-inositol 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酰肌醇3-激酶的抑制劑。