Abstract: The integration of digitization is the fundamental guarantee and core driving force for the high-quality development of teaching. Under digital transformation, the “dual line” teaching space is expanded, the content is enriched, process differentiation is obvious, the management is more refined, the assessment is more comprehensive, the evaluation is more diverse, the evaluation is more satisfactory, and reflection and summary are constantly carried out. However, there are still some difficulties to adapt to the requirements of digital teaching, teachers still lack digital comprehensive literacy, and the mismatch between the supply and demand of digital teaching resources. The teaching mode lacks support for digital teaching objectives, and there are obstacles such as inconsistency between teaching evaluation management and digital management. Therefore, the optimization path for high-quality development of teaching under digital transformation can be achieved by creating a smart teaching environment, enhancing the digital literacy of teachers and students, innovating teaching digital applications, and using digital governance as a means to enhance teaching management and evaluation.