Abstract：Since he decided to be engaged in revolution, Sun Yatsen had taken overseas Chinese as the main support to his revolution. He not only, with his whole efforts, developed revolutionary organizations as well as revolutionary newspapers and magazines among overseas Chinese, but also financially depended on them. In fact, it was under the overseas Chinese financial support that Sun Yatsen and his comrades carried out a series of revolution activities. However, overseas Chinese power was rather limited, negative effects had been imposed on the revolution because Sun Yatsen just neglected the revolutionary power at home. In particular, financial difficulty had directly caused the failure of the 10 upsurges before the revolution of 1911, and the splitting of the United League as well. The reason that Sun Yatsen just regarded overseas Chinese as the main support was essentially because he himself was an overseas Chinese, which made him know little about conditions inside China. He knew the overseas Chinese request for revolution, but failed to realize the great revolution power of the people at home.
