There will be an accumulation phenomenon in the flow of talents, and the phenomenon of talent accumulation will bring about the effect of accumulation that 1+1>2 in the harmonious environment. The effect of accumulation can accelerate technological innovation and the development of hightech industry. Based on the analysis of the effect of talent accumulation and its environment, the effect and environment of talent accumulation in Silicon Valley and Zhongguancun were studied comparatively. The effect of environment on the talent accumulation was analyzed.  Countermeasures on how to promote the phenomenon of talent accumulation to turn to the effect of talent accumulation are also proposed.