Abstract: In present study 180 children aged 4～6 years in participated a within-subject design experimental procedure consisted of three situations.The first is an oral judgment situation on other children's sharing behaviors, the second one is a real sharing behavior situation of occasional object,and third one is a real sharing behavior of own possessive object.Results show that(1)90% of 4 year olds and 100% of 5～6 years of age made a right judgment when they do not take role of story.When they took role of the story,the rate of right judgment of 4 year olds declined to 81%,but the judgment of 5～6 years of age was not changed.(2)About 25% of 4 year old children,50% of 5 year olds and 71% of 6 year olds shared own occasionally gained toy to their peer.The developmental trend is significant,a critical age is at 5 years of age.(3)Overwhelming children of 4 year old could not distinguish an occasionally gained object and an object that received in competition as bonus,but most children at 5～6 years of age viewed the bonus as "own possessive thing".Over 80% children of 4～6 year old were not willing to share such a bonus to the peer who lost in competition.(4)There is a no correspondence between sharing judgment and real sharing behaviors,it appear in the situation of sharing the occasionally gained object in part of 4～5 years of age children and overwhelming children of 4～6 years of age in the situation sharing own possessive object.

Key words: Sharing behavior, Occasionally Gained thing, Own possessive thing