Abstract: Based on the attention-based and age-dependent theory, this paper takes the start-ups listed from 2013 to 2017 as the research object, and on the basis of the text analysis of entrepreneurial policies under the background of "Internet +", verifies the impact of "Internet +" entrepreneurial policy strength, quantity and content on the fusion with the internet by start-ups, the results show that: (1) The relations between the strength and quantity of entrepreneurial policies and the degree of “Internet +” fusion of start-ups are inverted U-type; (2) Age has a negative moderating effect on the relations between the strength and quantity of "Internet +" entrepreneurial policies and the fusion of "Internet +" by start-ups; (3) The structure of entrepreneurial policies in the context of "Internet +" mainly includes five major policy themes, i.e., platforms, space for creation and base construction, financial support, talent introduction and training, technical support, and innovation service system construction and improvement. And these five major policy themes have positively promoted the fusion with the internet by start-ups.