The importance of the research lies in the design of a device that takes into account the development of accuracy, the skill of straight and diagonal crushing, as it will replace the chance as well as the exercises that will take into account the accuracy of the skill in order to achieve the importance of the research. Significant in the development of the skill of crushing hitting and from various playing centers, which may be caused by the lack of interest in this important and difficult skill compared to the other five skills. ) in volleyball One of the objectives of the research is to identify the effect of exercises using a device designed for the wall in developing the accuracy of the skill of the Qatari and straight smashing skill in volleyball for young players. The researchers used the experimental method in the way of the two groups with the pre- and post-test. The research community consists of Al-Sina’a Sports Club players (youth category) aged (17-18) years. The results of the tests were presented to the accuracy of the skill of the pre and post smashing of the sample, their analysis and discussion by way of data processing. The researcher reached several conclusions that the use of special exercises on the device designed for the wall by the researcher has a positive effect for the experimental group in improving the accuracy of the volleyball hitting skill and used the exercises The private and its diversity and gradation have a clear role in achieving significant differences between the experimental and control groups in the post-tests and in favor of the experimental group. Keywords: special exercises, a device designed for the wall of the wall, the accuracy of the skill of crushing strike.

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