The cognitive method is a very practical method of mental training, in order to verify the dynamic method to study the effect of teaching swimming and the action of the memory effect, this experimental method and survey method and other methods of analysis. The results showed that cognitive methods can reveal the essence of motion rules of control of acceleration technology, improve efficiency of movement and learning skills; cognitive method can stimulate the thinking of the students, breaking the traditional teaching of the shackles of divergent thinking on the brain, improve memory effect; Intentional forgetting law teaching for knowledge, students rate lower than the control group 12.9%, much higher than the effect of reproduction on the traditional teaching (P<0.01), is conducive to keeping the memory of students, help students cultivate lifetime sports in the sense and establishment of lifetime sports training effect.