Background The aim of the study was to determine the value of indices of tactical and technical preparation (PTT) of Russian judo athletes during the Olympic Games in London. The values of these indices may designate the direction of activity in the process of special preparation and in the search for factors to optimize training before the main competitions. Material/Methods: During the Olympic Games in London in 2012, Russian judo representatives fought 31 fights. A multiple analysis of video footage and graphic registration allowed marking 423 technical attacks (including 24 efficient attacks) of the representatives of Russia and 384 attacks (including 5 efficient attacks) performed by their opponents in these competitions. On the basis of the classification of judo techniques developed by Kodokan Judo, an assessment of the effectiveness of particular groups of techniques has been made. The most commonly used technique and the dominant techniques used by the observed athletes have been distinguished. Indices of tactical and technical preparation have enabled the identification of characteristic features of preparation of the representatives of Russia and of their opponents during the Olympic Games in London in 2012. Results: Russian athletes were characterized by high efficiency of techniques from the grappling group. The dominant techniques were: varieties of the broken scarf hold (kesa gatame kuzure), back-lying perpendicular armbar (ude hishigi juji gatame), sweeping hip throw (harai goshi) and the sacrifice throw "valley drop" (tani otoshi). Athletes were characterized by stable efficiency of techniques from all the groups of throws and with 100% efficiency of defence in ground fighting. Russian competitors were far superior to their opponents in the efficiency of the ways and directions of performing throws (Ea - WP, NP, F, B). They retained a positive index of activity (A = +1.162). The advantage of values of the determined indices of tactical and technical preparation among representatives of Russia over their opponents in the Olympic Games in London was commensurate with the obtained results. Conclusions: The efficiency of Russian athletes during the OG in London was confirmed by the values of the indices by which tactical and technical preparation was evaluated. The analysis of indices allowed characterizing features specific to Russian representatives.