Paleoproterozoic granite is widely exposed in northern Zambia, which is a natural laboratory for studying the magmatism and tectonic evolution in the Banweulu block. In this paper, systematic studies of petrology, LA- MC- ICP- MS zircon U- Pb geochronology, petrogeochemistry and Lu- Hf isotopes were conducted on the exposed granites in Kapatu area, northern Zambia. The results show that the main granites in the Kapatu area were formed between 2012±11~1970±20Ma, and the emlocation age of the late shallow- flesh- red porphyritic syenogranite was 1959±16Ma, both of which were paleoproterozoic magmatic activities. A large number of Archean captured zircons show that there may be remnants of Archean crustal components in the Bangweulu block. The Kapatu granites have high SiO 2 (67. 93%~72. 80%), high aluminum (13. 85%~14. 91%), high Na 2O/K 2O (0. 29~0. 89), low MgO (0. 38%~1. 93%), and low P 2O 5 (0. 10%~0. 23%). A/CNK values range from 1. 04~1. 19, and the CIPW corundum standard molecular index is greater than 1% (1. 01%~2. 51%). The chondrite- normalized REE patterns of the granites show right oblique. The main granites have relatively high total rare earth elements (ΣREE=191. 79×10 -6 ~294. 25×10 -6 ) with evidently negative Euanomalies ( δ Eu=0. 26~0. 53), where as the late shallow- flesh- red porphyritic syenogranites have relatively low total rare earth elements (ΣREE=48. 58×10 -6 ~54. 00×10 -6 ) with positive Eu anomalies ( δ Eu=1. 04~1. 37). The Kapatu granites were enriched in large- ion lithophile elements (LILEs) (e. g. Rb, K), but depleted in Ba, Sr and high- field- strength elements (HFSEs) (e. g. Nb, Ta), and have low Cr (3. 56×10 -6 ~65. 6×10 -6 ), Co (1. 99×10 -6 ~12. 5×10 -6 ), and Ni (2. 16×10 -6 ~33. 7×10 -6 ). The above results show that the Paleoproterozoic granites belong to S- type granites. Hf isotopic results show that the ε Hf ( t ) values and two- stage Hf model age ( t DM2 ) values were -15. 9~+4. 7 and 2289 ~ 3596Ma, respectively, far older than the crystallization age of zircon, indicating strong heterogeneity in the composition of the magma source, which was derived from the ancient Archean- Paleoproterozoic crust source mixed with different contribution of mantle materials. In addition, the higher CaO/Na 2O and the lower Rb/Sr ratios of the main granites indicate that they were derived from the partial melting of arenaceous rocks. Meanwhile, the low CaO/Na 2O and high Rb/Sr ratios of the shallow- flesh- red porphyritic syenogranite indicate partial melting of argillaceous rocks. Combined with the regional and global tectonic evolution history, it is suggested that the Kapatu granites were formed in syn- collision tectonic setting of Bangweulu Block and Tanzania Craton and the paleoproterozoic magmatic events in the Bangweulu block may be the response of the Columbia supercontinent.