There are two causes of strict parenting. The first cause is that many parents want their children to study hard. For example, research has shown that a lot of parents think if their children have a good grade or do well in their education, their children will be successful in the future.This is a reason many parents are strict in studying of their children. The second cause is that they want their children to have the best thing in life. For example, research has shown that authoritarian parents think they know what is best for their children. They don't care what their children think. It depends on what they think. If they think that thing is good to choose, they will choose it to their children. In short. the two causes are many parents want their children to study hard and have the best thing in life.