Reproductive regulation of 24 captive badgers（Meles meles amurensis）were observed and recorded around the clock on a badger farm in Songbei District, Harbin City by using infrared monitoring equipment from March to October in 2013. Moreover, all data were analyzed by Excel 2010 software. The results indicated that badgers mated from the end of March to the beginning of May (Fig. 1), and gave birth from the end of March to the beginning of April, thus their pregnancy duration extended as long as 11 to 12 months. While the former internal treatises reported that badgers’ mating behavior mainly occurred in July and August. The variation of their mating time showed that the time of delayed implantation also had a significant change. The study of mating frequency in each time period of the whole day indicated that the mating happened at any time, and the frequency of daytime was similar to nighttime. The lengths of mating ranged from 10 to 110 minutes, mainly between 60 and 80 minutes. The observation also found that badgers' mating (including the frequency and length of daily mating) had obvious periodicity.