Juvenile robbery is mainly in the form of joint crime and accomplished crime, and the elements of criminal motive and criminal instrument have special value. Its judicial countermeasures at the trial level are as follows: alternative conviction, unconverted conditions of robbery, negation of aggravated crime, elimination or mitigation of the wrong understanding of criminal illegality This paper adopts case analysis, experience summary and literature analysis in research methods. It is expected to reveal juvenile delinquency, enrich and improve the existing criminal psychology system, and correctly educate minors for families and schools, and cultivate a sound personality through the study of juvenile delinquency psychological characteristics, causes of criminal psychology and prevention of criminal psychology.