随着互联网技术的发展，互联网金融应运而生。互联网金融的出现给商业银行带来了显著的影响，如何使商业银行在新形势下进一步提高竞争力，保持其在金融业中的核心地位对稳定我国金融体系、提高金融对实体经济支持效率具有十分重要的现实意义。 本文在概述互联网金融基本概念、模式的基础上，从核心业务和效率两个层面细致地分析了互联网金融对商业银行的影响。在核心业务方面，通过逐个分析互联网金融对商业银行三大核心业务（负债业务、资产业务以及中间业务）的影响，探究互联网金融对商业银行盈利状况的影响程度；在效率方面，在通过DEA模型测度商业银行三大效率（综合效率、纯技术效率以及规模效率）的基础上，运用向量自回归模型分析了互联网金融对商业银行三大效率的影响，并进一步通过脉冲响应函数分析了影响的方向及其时滞特征。 研究结论表明：在核心业务方面，互联网金融通过蚕食商业银行的市场份额，削弱其垄断地位和竞争优势，减少其利润，对其经营带来了负面影响；与此相反，在效率方面，互联网金融对商业银行的综合效率、纯技术效率和规模效率均具有显著的正向影响，互联网金融通过倒逼机制提升了商业银行的效率，对其经营产生了正向影响。本文认为，互联网金融的出现对商业银行既是机遇也是挑战。在互联网金融的演进中，商业银行应该积极面对挑战，适时抓住机遇，化冲击为动力，以“竞争合作”作为应对互联网金融的总体思路，不但要与互联网金融企业互利合作，积极扩大整体市场份额，而且要与互联网金融企业适度竞争，努力提高自身竞争力。

With the development of Internet technology, Internet finance emerged. The emergence of Internet finance has brought a significant impact on the commercial banks, how to further improve the competitiveness of commercial banks in the new situation, to maintain their core position in the financial industry has very important practical significance to stabilize China’s financial system and improve the efficiency of financial support for the real economy. Based on an overview of the basic concepts and models of Internet finance, this thesis detailed analyzes the impact of Internet finance on commercial banks from two aspects of core business and efficiency. In terms of core business, the thesis analyzes the impact of the Internet finance on commercial banks’ three core business (debt business, asset business and intermediary business) one by one, in order to explore the impact of Internet finance on profitability of commercial banks. In terms of efficiency, based on the measurement of commercial banks’ three efficiencies (comprehensive efficiency, technical efficiency and scale efficiency) by DEA, the thesis analyzes the impact of Internet finance on commercial banks’ three efficiency by vector autoregressive, and analyzes the direction and time delay characteristics of the impact by impulse response function. Conclusions of the study: in terms of the core business, Internet finance brings a negative impact on commercial banks by eroding their market share, weakening their monopoly position and competitive advantage, reducing their profit; on the contrary, in terms of the efficiency, Internet finance has a significant positive impact on the comprehensive efficiency, technical efficiency and scale efficiency of commercial banks, it enhances the efficiency of commercial banks through forced mechanism, it has a positive impact on the operation of commercial banks. This thesis argues that Internet finance is both an opportunity and a challenge for commercial banks. In the evolution of the Internet finance, commercial banks should actively face the challenge and timely seize the opportunity, regard impact as a driving force, take “competition and cooperation” as the overall plan of the response to Internet finance, not only to beneficially cooperate with Internet finance, and actively expand the overall market share, but also to moderately compete with Internet finance, and strive to improve their own competitiveness.