This paper is a systematic analysis of the cores unearthed from the Shuidonggou Locality 12 in 2007, which includes 46 traditional flake technological cores, 82 bipolar cores, and 95 microcores. Based on the sizes a nd technological characters of the cores, it is reasonable to say that the flake cores are preparations of microcores. Bipolar technology is mainly used for working on smaller sizes or good quality raw materials represented by chert, which may not be suitable for direct/indirect flake technology. Microblade technology is key to this site with wedge-shaped microcores the most systematic. The phenomenon of microblade technology in North China during the Late Upper Paleolithic was widespread, and was the technological support for hunter-gatherers to subsist in the climatic fluctuations during the end of Pleistocene.