Abstract: The mechanism of spontaneous broken symmetry and its model are discussed in the language of fundamental physics, also, the discovery of the mechanism of spontaneous broken symmetry in subatomic physics by Yoichiro Nambu and the discovery of the origin of the broken symmetry by Makoto Kobayashi and Toshihide Maskawa are introduced. The experiments of the discovery of the least three families of quarks are presented.

Key words: quark, symmetry, broken, mechanism