Grammar learning is known for one of the critical elements in vocational college English, especially in College English Test level B (CETB). Yet traditional college English grammar teaching is also known for its low efficiency and unsatisfactory learning experience as well as passive learning atmosphere. Due to the outbreak of Covid-19, the shift to distant learning during the pandemic brought about a challenge but also an opportunity for educators. In light of the spirit of College English Reformation, how to maintain and optimize the learning experience with support of information communication technology (ICT) becomes an increasingly urgent question. Guided by blended approach, based on grounded theory, this study is to explore the impact of blended approach on students. Based on the results of class observation, questionnaires to 10 English teachers and 962 students in Guangzhou Donghua Vocational College (GDVC), the study identifies prominent problems emerged in the college English grammar teaching and offers constructive solutions with Discover, Learn, Practice, Collaborate and Assess (DLPCA) blended model, which promotes the learning outcome, enriches the learning experience and lightens the learning atmosphere. This research updates the application of ICT in college English grammar teaching and provides a different perspective to blended language teaching under the outbreak of Covid-19 pandemic context.