The first edition was published in the summer of 2008. This paper summarizes the main points of junior high school mathematics competition from algebra to geometry to miscellaneous questions. It is also marked with an asterisk to indicate difficulty. Four stars is the hardest. Among them, the synthesis of circles and some related topics of geometric theorems are more difficult, such as Meyer theorem and Seva theorem. Algebra topics are easy, but some equations and equations that can be reduced to quadratic equations are more difficult. The following miscellaneous questions are also difficult. But now junior high school math competitions involve less. What's more, although Gaussian function is also a miscellaneous question, it can often be tested in the small questions of junior high school mathematics competitions. Many conclusions and theorems above can be directly used, which is very beneficial to simplify the complex.