According to the requirements of the current primary school mathematics teaching syllabus, this paper briefly introduces the basic ideas, ways, methods and skills of solving problems in primary school mathematics from grade four to grade six in view of the key points and difficulties in teaching. The book is divided into five parts: concept, calculation, equation, application and geometry. The answers to the exercises are attached at the end of the book. "Problem-solving Skills in Primary Mathematics" can help senior primary school students to deeply understand and master the basic knowledge and problem-solving essentials of primary mathematics, which can also serve as a reference for relevant teachers and parents in teaching and counseling.