Abstract: Depending on the methods of literature investigation, expert consultation, mathematical statistics, co-occurrence analysis, the paper researches the features of interdisciplinary knowledge integration of foreign strength training in last 100 years, with the result showing that disciplines related to foreign strength training research have seen exponential growth and among them, sports science, physiology, rehabilitation and nutrition are more involved. The knowledge exchange network between disciplines has witnessed remarkable characteristics of small world, but the interdisciplinary knowledge integration on the whole is not frequent or smooth, with knowledge overlapping and fusion between two disciplines. Foreign researches on strength training began in the sequence of single disciplinary research, double disciplinary research and then multidisciplinary research with obvious phase characters. Interdisciplinary integration of knowledge between new research subjects and relatively mature disciplines is an important knowledge innovation mechanism in the field of foreign strength training research.