Abstract
The psychological mechanism of reward is to form operational conditioned reflex through positive reinforcement and negative reinforcement. The positive effect of reward is to strengthen external learning motivation, and reward can sometimes improve creativity. The negative effects are: weakening students' creativity, weakening the internal motivation of learning and hindering the development of autonomy. Teachers should apply educational rewards scientifically, take care of their age, consider the difficulty of tasks, pay attention to stimulating students' internal motivation, and give priority to spiritual rewards, supplemented by material rewards.