This article discusses the issue of how we can effectively enhance the mathematical knowledge and problem-solving ability of the secondary school pre-service teachers, the reformed teaching featured by mathematical modeling and the use of technology is recommended for the mathematics teacher preparation programs. several examples that embody the integrations of mathematical modeling and technology are introduced to show how these problem explorations help the pre-service teachers take advantage of visual images of mathematical ideas, organize and analyze data in a more meaningful way, and develop a more coherent, flexible, and systematic understanding of the mathematical content.