With the wide application of 5G, artificial intelligence and other information-based equipment, the traditional business model of commercial banks is accelerating the transformation to information-based and intelligent mode. Intelligent robots are gradually replacing the traditional bank employment posts or simplifying the business process of manual operation, leading to fundamental changes in the income distribution pattern of banks. Based on the data of 20 A-share listed commercial banks in China from 2006 to 2021, this paper systematically measures the technological progress bias of China's banking industry, and integrates Hicks' technology progress bias index and employee income gap into the empirical model to test the marginal impact of technological progress bias on bank income growth and income gap, and uses the intermediary mechanism model to explore the impact of technological progress bias on bank income The influence mechanism of growth rate and income gap. The results show that: the technological progress of China's banking industry is generally biased towards capital, which is contrary to the principle of comparative advantage, which intensifies the distortion of capital and labor factors, has a certain inhibitory effect on the income growth of commercial banks, and reduces the income distribution gap within the banks; from the perspective of transmission mechanism, technological progress bias has a direct impact on the relative income gap of banks. The direct contribution rate is 28.38%, and the indirect contribution rate is 36.64% and 34.98% respectively. This paper argues that adjusting the direction of China's commercial banks' progress to make it more in line with the characteristics of China's factor endowment comparative advantage is the key to maintain the sustained growth of commercial income; at the same time, eliminating the distortion of capital and labor factors market is an important means to narrow the income distribution gap of banks.