Plyometric training is one of very prevailing training methods. It has its unique effect compared to other training methods. Many bibliographies also show substantial support for the effect that plyometric training may have on the reinforcement of leg muscular strength and explosive power. Having targeted 16 girl basketball players in senior high school, a set of box horse curriculum was designed with polymetric training for the study. The players were randomly divided into experimental groups (respectively with 30, 40, and 50cm of box horse) and control group, four players for each group. Except for the control group, the other three groups had to receive 12 weeks of box horse training in addition to general basketball course training. It was the methodology and design used for this study. The collected data were used to compare the variance between pre and post tests by two-way ANOVA and trend analysis. While the level of significance was set at α=.05, the results of the study showed: on the part of Squat Jump (SJ), there was a p＜.05 of significant level between the groups of 30cm and 40cm and control group, and no significant level for 50cm group. Within the control group, there was more significant level, but amongst 30cm, 40cm and 50cm groups, significant level was not so obvious. On the part of Counter Movement Jump (CMJ), both experimental groups and control group all reached the level of significance at p＜.05. In terms of the analysis for trend variance test in Continue Jump (CJ) testing, the linear trend (F=359.93 p＜.05), the second trend F=626.95 p＜.05), and the third trend (F=266.01 p＜.05) all reached a level of significance, and the interaction(F=4.24 p＜.05)also arrived at the level of significance. Based on the plyometric training designed and applied to senior high school girl basketball players, this study shows that either CMJ or CJ has its effect.