The crime of clique robbery is occuring more and more now, the difficult problems that a public organ faces is to attack and take precautions against robbery effectively.

However,the largest proportion of the robbery crimes is peasant and it has made the greatest influence.

Seizing by force cannot be simply equal to robbery crime for its particularity e mbodied by 16-year-old as beginning point in crimina l responsibility, and by amo unt, lethal weapon and punishment, which is favorable for balance between the cr ime of seizing by force, standard robbery and robbery crime.

Sex seduction robbery is a very special form of all robbery cases.

Robbery of minor has developed very quickly in recent years.

The concept of the criminal gang with the underworld characteristic is wrong.

The crime has presented evolution quickly from gang crime to crime of underground society organization, vastness within the criminal zone and clear type of criminal organization.

The article starts with one case of the post-1990s gang crime,tries to analyzes and discuss the psychological mechanism of them,and expects that it is beneficial to prevent and reduce teenage regiment crime.