Facing the call of the times, mathematics teachers should actively cultivate students' mathematics core literacy in classroom teaching. Although "mathematics wide angle" in primary school is an excellent position to cultivate students' mathematics core literacy, the current situation of the cultivation of mathematics core literacy in "mathematics wide angle" teaching is not optimistic. Here, taking the lesson of "tree planting" as an example, this paper analyzes the current situation and problems of the cultivation of mathematics core literacy in "mathematics wide‐angle" teaching from four aspects: teaching objectives, teaching contents, teaching methods and teaching evaluation. In view of this, teachers can only base on the core quality and formulate the teaching goal of "mathematics wide‐angle"; Deeply study the teaching materials and fully infiltrate the teaching of core literacy; Flexible choice of teaching methods to promote the cultivation of core literacy; Only by improving the contents and methods of teaching evaluation and considering the indicators of core literacy can we better cultivate students' mathematics core literacy in "mathematics wide‐angle" teaching.