The present study carried out in Kisangani area on the biodiversity of Rodents and Soricomorpha mixed culture fields in some villages of the surroundings of Kisangani. The main goal was to evaluate the specific richness of rodents and Soricomorpha in these habitats. In 8.955 nights traps, by using the technique of trapping out of grid using the Traps Victor Rat Traps, Special Museum, Sherman and traditional trap, we collected 301 specimens of small Mammals belonging to two orders: Rodents (288 specimens: 95.6%) and Soricomorpha (13 specimens: 4.31%). These animals are subdivided in 12 species. Nannomys cf grata was the most abundant with 168 trapped animals (55.81%). Nannomys cf grata, Lemniscomys striatus (Linnaeus, 1758) and Lophuromys dudui (Verheyen, Hulselmans & Dierckx, 2002), Praomys minor (Hatt, 1934) and Praomys cf jacksoni are field species who are harmful for crops. The diversity index of Simpson "D", Shannon Wiener "H" and the equitability "E" were respectively 0.6625, 0.2358 and 0.6577. The calculated values of these indices show a low diversity with a bad distribution of trapped animals between different species in the studied crop cultivation fields. All identified species are common in the Kisangani area. It is therefore necessary to set up a control policy in order to fight against these culture destructors in Democratic Republic of the Congo.