The problem is important due to increasing demand in research of radioactive elements distribution in soil cover of industrial cities with high man- caused load. Objective: soil cover pollution level analysis in cities and suburban area according to the study of total contents of radionuclides (U, Th). Methods of research: non-destructive X-ray fluorescence analysis using X-ray spectrometer S4 Pioneer made by Bruker AXS (Germany), statistical and mapping methods. Results. Comparative chemical analysis of soil in the content of radionuclides U and Th and exposure dose rate survey has been held in two cities of Baikal region - Irkutsk and Angarsk. Soil samples analysis in the territory of Irkutsk city within specified earlier anomalous city zones confirmed the presence of relatively high Th and U concentration: Aircraft factory (U), Military warehouse (Th), several gasoline stands in city area, «Yunost» island (U). It is an interesting fact that the higher content of uranium and thorium is always detected in different places of the city. The content of uranium within 0,5-10,6 mg/kg and thorium within 1,8-30,8 mg/kg in soil cover of Angarsk city including residential, industrial zones and suburbs exceed regional level only in some local areas related to heat power objects. The higher content of uranium - 10,1-17 mg/kg and thorium - 29-44 mg/kg was detected in sludge samples from ash-disposal area. Conclusions. Th and U gross contents survey in soil cover of industrial cities of Baikal region - Irkutsk and Angarsk, and their suburbs showed wide variability in values often exceeding average figures of Baikal region, but average content levels are very close. Irkutsk city local anomalies are characterized by a higher content of uranium in soils compared with those in Angarsk city which is due to the fact that industrial objects are outside the residential area in Angarsk. The increased content of thorium and uranium as well as exposure dose rate are registered in cover soils locally and in small areas around industrial facilities or at some distance from them indicating that content has aerotechnogenic origin. It was found that buffer capacity of ecosystems in the considered cities has not reached a critical level of radionuclides content and corresponds to the regional parameters.