Avoiding online idioms in educational materials** will not affect the understanding of young readers**, but has many positive meanings. Internet idioms are characterized by simplicity, randomness, and personalization. They often lack normative and stable nature. The meaning may not be clear and fixed, and there may be differences in the understanding of the same Internet idioms by different regions and groups. This will interfere with the accurate communication and understanding of knowledge, especially for educational content that requires rigorous expression, and may cause misunderstandings among young readers. Educational materials are aimed at a wide audience and need to be widely versatile and have long-term value. Standardized language expression is easier to understand and accept by readers of different ages and backgrounds, which can ensure the accurate transmission of knowledge and avoid the ambiguity of language that affects the educational effect. Young readers are in an important stage of knowledge reserve and language learning. Exposure to standardized languages helps them form correct language habits and language literacy, and lays a solid foundation for future study, work and life.