Since the birth of the Object Relation Theory, the current development has become more
mature, and it has become the most characteristic part of the psychoanalysis and family therapy.
The Object Relation Theory’s exploration of mother-infant relationship has opened a landmark
transformation of psychoanalytic mode. The development history of object relation theory is closely
related to the factional disputes of psychoanalysis. The core psychologists in this field have made
outstanding constructions in different directions for its development and theoretical construction. The
core defense mechanism of object relationship therapy—projective identity is of great significance to
object relationship therapy.