The present invention provides the Imidazopyridazines of new formula (I), its pharmaceutically acceptable salt, include their pharmaceutical composition and its preparation process, and they inhibit the actual effect of PI3K and in treatment to the disease for inhibiting PI3K to have response, such as the potential use in diseases associated with inflammation, autoimmune disease or cancer.本發明提供了新的式(I)的咪唑并噠嗪類化合物、其藥學上可接受的鹽、包含它們的藥物組合物和其製備過程,以及它們抑制PI3K的實際效果及在治療對抑制PI3K有響應的疾病,例如炎症性疾病、自身免疫性疾病或癌症中的潛在用途。