The rapid development of science and technology, the rapid updating of computer technology, the constant networking, and computerisation of society are ushering in a new era in which computer technology and various media are used to process and disseminate information. Multimedia technology has also been mentioned and developed in the field of education. Its intervention has had a significant impact on education, leading to a renewed conception of educators, educational methods, and forms of learning. This paper is based on educational theory, educational planning theory, and educational psychology theory, starting from the combination of network multimedia and college English writing instruction through detailed demand analysis and system design, fully using modern information technology to build a multimedia network learning platform of blended college English writing instruction. This paper examines the application of multimedia technology in blended learning college English writing. Based on the reading and collecting of a large number of materials, it combines the long-term experience of teaching practice, the concept of multimedia, characteristics, application status, and development trends of multimedia technology; in-depth analysis of the current situation and problems faced by blended learning English writing in college summarizes the application of multimedia curriculum in teaching practice and feedback on the use of multimedia curriculum in teaching English writing in college. The experiments showed that the
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value of students’ attitude toward English writing and multimedia teaching method is less than 0.05, which showed that the multimedia teaching method could improve students’ self-discovery ability and enhance the learning effect; the repetition of multimedia teaching material conforms to the memory rules and effectively helps students to remember what they learn repeatedly.