"Preschool education scientific research" is a branch and an important part of educational scientific research. It refers to using scientific methods to consciously, purposefully and systematically understand, collect, sort out and analyze educational phenomena in pre-school stage, so as to discover and understand the essence and objective laws of educational phenomena. "The word" ethics "comes from the Greek word ξ'θοδ(ethos), which originally refers to the place where a group of people live, then refers to the essence or stable nature of a phenomenon, and finally is used to express all human characters, qualities and virtues. In Aristotle's view, ethics is a series of qualities related to quality and the correct behavior of how to realize these qualities. If extended, ethics is to improve people's internal quality and external practice. It can be seen that the scientific research of preschool education is a scientific research aimed at improving children's personality and quality and promoting children's physical and mental development. However, children have their own unique physiological and psychological characteristics, such as rapid physical development, immature mind, poor language expression and understanding, lack of ability to distinguish right from wrong, and impulsive emotions. These characteristics mean that children are more vulnerable to adverse effects and injuries, and scientific research in preschool education is more special, so we should pay more attention to the ethics of research to avoid adverse effects and injuries on children's body and mind.