Companies established within five years are usually called startups and are usually characterized by small size, limited resources, innovative business models or products, passionate and energetic founding teams, and multiple challenges. Start-up companies are the vitality and source of social and economic development. All unicorn companies and conglomerates evolve from start-up companies. Today, when social classes are relatively rigid, founding a company is one of the ways to quickly achieve economic freedom and social value, and it is also a core part of promoting social and economic development. This article combs through the relevant literature on the influencing factors of entrepreneur behavior, analyzes the internal and external environment faced by entrepreneurs, and explores entrepreneur behavior based on the personal characteristics of entrepreneurs. It has a certain guiding significance for the behavior of start-up company operators and has a certain guiding significance for policies. It has certain reference significance for framers to better formulate relevant policies to encourage entrepreneurship.