Abstract: In recent decade, systematic field investigation has been conducted along the eastern area of Mount Song, and more than 300 Paleolithic sites were discovered. The sites distribute in the tributary valleys, the Upper reaches of Huai River including Jialu, Yishui and Weishui branches. Some of the sites were selected for the excavation (e.g. Zhaozhuang and Huangdikou in Xinzheng, Xishi in Dengfeng and Laonainaimiao in the southwest suburbs of Zhengzhou City). The archaeological records show a great development in terms of technology and human behavior, and the change of settlement pattern during the MIS3 from 50ka BP to 20ka BP. Based on the comprehensive analysis of lithic assemblages, the technological evolution in the Upper Paleolithic of the northern part of China is indicated by the change from flake technology to blade and microblade technology.

Key words: Lithic technology; Blade; Human behavior; MIS3 stage; Songshan Mountain