The Kibara Belt is an important Mesoproterozoic tectonic belt in central Africa, which is of great significance for the reconstruction of the Colombia and Rodinia supercontinents. The Kibara Belt can be divided into two parts: the Karagwe—Ankole Belt(KAB) in the north and the Kibaride Belt(KIB) in the south, and the boundary between them is Paleoproterozoic Ubendian—Rusizi Belt. The KAB can be further divided into Western Domain(WD) and Eastern Domain(ED) by Kabanga—Musongati mafic—ultramafic intrusions, in which Kagera Supergroup and Akanyaru Supergroup deposited respectively, whereas the Kibraran Supergroup deposited in KIB. All the lithostratigraphic units began to deposit after the Ubendian orogeny and the debris was mainly derived from the Tanzania Craton and the surrounding Palaeoproterozoic belts. There are mafic and ultra- mafic magmatism of about 1375~1400 Ma in KAB and KIB which have different genesis. The granitic magma is mainly divided into four stages from early to late: D1, A- type granite, D2 tin- granite. The A- type granite may be related to the depleted mantle and the others are the product of partial melting of metamorphic sedimentary rocks. Based on the stratigraphic sequence and the ages of the magma, the tectonic evolution of the Kibara Belt can be divided into:  (1) Pre- subduction sedimentary stage: deposition in ED at about 1780 Ma and in WD and/or KIB at about 1420 Ma. (2) Subduction stage: mafic and ultra- mafic magmatism from about 1400 Ma to 1375 Ma, D1 granitic magmatism at about 1375 Ma and A- type magmatism at about 1200 Ma. (3) Continental collision stage: D2 magmatism at about 1100 Ma.  (4) Late and post- collision stage: tin- granitic magmatism at about 980 Ma and Itombwe Supergroup deposited later.