Indazole compounds of formula (I) as cyclin-dependent kinase (CDK) and cell-proliferation inhibitors, and therapeutic uses and methods of preparation thereof, are disclosed. These compounds, and pharmaceutically acceptable salts, solvates, prodrugs, and pharmaceutical compositions thereof, are useful for treating diseases and disorders associated with activity of cyclin-dependent kinases, in particular CDK4/6, including but not limited to various cancers and inflammation-related diseases or conditions.本發明揭示做為週期素依賴型激酶(CDK)及細胞增殖抑制劑之式(I)之吲唑化合物及其醫療用途及製備方法。此等化合物及其醫藥學上可接受之鹽、溶劑合物、前藥及醫藥組合物適用於治療與週期素依賴型激酶,尤其CDK4/6之活性關聯之疾病及病症,該等疾病及病症包含(但不限於)各種癌症及炎症相關之疾病或病狀。