Because of the police’ law activity especially the property and characteristics of the case investigation,we need to comprehend each kind of crime from different features of performance in criminal motivation.It is very necessary for understanding case’s cause and property,analyzing crime motive to the influence of criminal activity and degree.According to the difference of the criminal characteristic propensities,it is divided into three typical criminal psychologies which corresponds each other: the correlated of single and complicate motivation,the correlated of gradual and sudden motivation and the chance and transform motivation.
