The field of education in the digital era is undergoing tremendous changes, and computational thinking, as the basis for understanding and applying digital technologies, has become a key skill for learners in the 21st century. Challenges to the development of computational thinking in junior high school students include a single teaching method, teachers' overemphasis on programming language learning, a lack of systematic teaching content, and students' lack of problem-solving skills, which affect the development of computational thinking. Based on this, this study takes ninth-grade students as the research object, and adopts Quasi-experimental and Survey research methods under the guidance of constructivism theory, theory of mind and learning community theory to construct and validate a PBL teaching mode based on the cultivation of computational thinking in junior high school information technology curriculum. The results show that the PBL teaching mode for computational thinking cultivation is applied to the junior high school Mixly course to improve the computational thinking level of students. This study provides theoretical reference and practical significance for Mixly teaching oriented towards CT cultivation. © 2025 IEEE.
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