Abstract: For higher vocational colleges，the expansion of enrolment is not only opportunities lut alsochallenges. Due to the unbalanced foundation of educational background，diversified learning demandsand inconsistency of learning time，the nontraditional students of the extension enrollment，which ac-counts for a large proportion , will have a great impact on the existing education and teaching model of thecollege. In onder to formulate a teaching strategy due to the chawacteristics of the expansion group，teachstudents in accordance with their aptitude. Taking the grade 2020 and grade 2021 expansion students ofKurming Metallurgy College as the survey targets ,questionnaires of 4 dimensions ane formulated，whichare the basic situation of students ,technical and skills foundation，learning alility , learning willingnessand expectation. 'The survey results show that the expansion group has the characteristics of clear learningmotivation，umbalanced foundation of technical skills，weak leaming ability ，and outstanding contradic-tions between working and learning.On the basis of the conlitions of the expansion group，we can ex-plore from the following aspects when fomulating their specific strategies ; first，we must deepen school-enterprise cooperation and explore the “ dual subject”cultivation model; second，we must deepen the re-form of credit system，and explore“ 1 + N merm ”talent cultivation model; third，we must promote thereform of the teacher，the teaching method and the textbook，and explore the“Learn through practice”teaching model ; fourth，we must speed up the construction of “smart campus”and explore the flexiblemanagement model.

Key words: higher vocational enollment expansion, learning situation analysis, talent cultivation