Zircon U- Pb geochronology, Lu- Hf isotopic compositions and geochemistry characteristics of the quartz diorites are always used to reveal tectonic activities and evolutions of the Bangweulu Block. The zircon LA- MC- ICP MS U- Pb dating results of the quartz diorites show that their weighted 207 Pb/206 U age is 1964±8 Ma (MSWD=0. 87, N=32) and 1913±10 Ma (MSWD=0. 77, N=19), respectively, indicating that the intrusions of the quartz diorites intruded in the Palaeoproterozoic and have a good relation with the Paleoproterozoic Ubendian Belt. The whole- rock geochemical analysis results show that the quartz diorites are metaluminous and belong to the high- calc- alkaline series. The rare earth elements chondrite standardized curves show that they are rich in light REE and deplete in heavy REE with weak negative δEu(0. 77~0. 80). The quartz diorites are enriched in LILE (such as K, Ba and Rb), LREE and more mobile incompatible elements (such as Th and U), relatively depleted in HFSE (such as Nb,Ta, P, Sr and Ti). Nd/Th of 3. 60~4. 65, Nb/Ta of 12. 05~13. 87, Th/Ta of 11. 14~11. 81, Ti/Zr of 36. 84~41. 71, Ti/Y of 220. 28~300. 00 and variable εHf(t) values of -3. 8 to 1. 3 and -4. 3 to 8. 6 suggest that the origin of the quartz diorites was a mixture of crust- mantle. Zr/Y of 5. 98~7. 19, La/Nb of 2. 91~3. 88, La/Yb of 12. 19~13. 92 and geotectonic discriminant diagrams show that the quartz diorites formed in an Andean- type active continental margin setting.