This paper uses the talent capital as the intermediate and follows the "talent congregation-talent capital-economic growth" (C-C-E) talent value-transform chain to study the talent congregation effects on local economic growth. Based on the data from 1990-2013, this paper figures out that average talent congregation level of Dongguan is 3.45%, and the talent capital contribution rate is 66.8%. Then the study analyzes the relationship between Dongguan talent congregation and human capital contribution rate quantitatively. Taken the comprehensive competitiveness and the capital congregation into consideration, this research selects five second-tier cities and makes comparative analysis with Dongguan. The results show that the talent congregation on economic growth of Dongguan exists leverage effect, and it creates high human capital contribution rate with relatively low talent congregation. Finally this paper explains the phenomenon from the perspective of industrial structure and talent efficiency.