Purpose: The purpose of this study was to explore the influence of softball players' involvement on the softball game and their experience of fluency on The sixteen softball field of Kaohsiung farm. Method: This study used self-report questionnaire as research tools, a questionnaire tool for this study was compiled after the reference of other scholars' research tools and the properties of softball. The researchers tested the paper based questionnaire for the participants in softball movement at the sixteen softball filed in Kaohsiung with the purposive sampling method. A total of 300 paper questionnaires were issued, and 272 valid questionnaires were obtained after the incomplete or obviously ineffective questionnaires were deleted. The recovery rate of the effective questionnaire was 90.67%. After the recovery of the questionnaire, the researchers used the structural equation modeling to carry out the follow-up data analysis. Results: The results show that the participation of softball players in The sixteen softball field of Kaohsiung farm can significantly affect their fluency experience, with a path coefficient of 63. Conclusion: According to the results of data analysis, the researcher put forward concrete proposals use peers to increase the sense of identity of participants, integrate softball into the lives of participants, establish a positive personal image of the participants to enhance participants' involvement in softball and further affect their fluency experience.