| Olympic volleyball games as one of the three events in the volleyball circles has always received attention of each country's volleyball team. All strong teams played their highest technical and tactical Level in the Olympic games. A volleyball team which wants to continue to grow and develop has to know both themselves and their adversaries , play their strengths, learn from the experience of other strong teams.The libero plays an important role in the volleyball game. He main task is mainly service reception and defensive of the back row, he can replace tall players in the field, so that they can have a rest in the fierce competition, and can make up for the shortcomings of a bad first pass and defensive of the tall members, the replacement of he and teammate do not include within the number of substitutions, he can replace the teammates according to the court needs within the rules and convey the intention of coaches, and can also organize attacks in the back. The 29th Olympic Games women's volleyball won the bronze medal, compared to 2004 champion performance as plummet.This article carries on analysis one by one the technical application effect of liberos of the the top four team in four attack systems with the method of literature method, video oberservation, mathematical statics. Through the anaysis,the thesis has discovered the advantages and disadvantages of the libero of the chinese women's volleyball team, draw the following conclusions:1,In the service reception and the offensive system, the level of service reception of liberos of the top four team in order were: Brazil, China, the United States, Cuba. Brazilian libero judged the ball accurately, footsteps flexible, then the rate of serve in place was as high as 68%. The main influence factors of the libero of Chinese women's volleyball team was that the high rate of the volleyball over the net when she receive service; whereas the libero of American Women's Volleyball team have the higher rate of not out of reach and receive miss than the other teams'libero; the rate of serve receive in place of the libero of Cuban Women's Volleyball team was the lowest among the top four teams.2,In the counter attack system, the level of spike and drop shot reception of liberos of the top four team in order were: the United States, Brazil, Cuba, China. American libero cooperated with the front blocker with the better rate of 36.2% in place. The rate was the highest among the four teams. The main influence factors of the libero of Brazilian women's volleyball team was that the high miss rate when she received the spike and the drop shot ; whereas libero of the Cuban women's volleyball team had the higher rate of the touch out than the other teams'libero; the rate of volleyball over the net and out of reach of the libero of Chinese Women's volleyball team in the game was higher than the other teams'libero. 3,In the security and attack system, the level of rebound reception of liberos of the top four team in order were: Brazil, Cuba, China, the United States.?The free man of Brazilian women in the race without error ball; While the other three strong free man in the game all have error balls, and the failure rate from high to low is Cuba, China and the United States.4,In push attack system, the reception in place rate of liberos of the top four team who received opponent dig and pass all were 100%, and the proportion of libero's reception number accounted for the gross number of the whole team's reception in order was the United States, Cuba, China and Brazil.5,In the service reception and the offensive system, the counter attack system, the security system, the proportion of Chinese women's volleyball team's libero's reception number accounted for the gross number of the whole team's reception was the highest among the top four teams. But the rate of her reception in place in the above three systems ranked the second place, the fourth place the third place among the top four teams. She still need to improve the rate of recepion in place.
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