揠苗助长

spoil things by excessive enthusiasm as one who tries to help the shoots grew by pulling them up

古时候宋国有个人,嫌禾苗长得太慢,就一棵棵地往上拔起一点。后来用来比喻不顾事物的发展规律,急于求成,反把事情弄坏

也说“拔苗助长”