In today's volleyball education course teaching, Using process evaluation can help students better understand their own volleyball sports ability, and process evaluation applied to volleyball teacher education reform can effectively help students build self-confidence in learning volleyball, lead students to develop interest in the process of learning volleyball, look for fun, exercise and get happy at the same time, can effectively promote students' learning Interest in volleyball education. But at present, most of the volleyball teaching in our country is still using traditional teaching methods, which has an impact on students' interest in Volleyball learning ability. The purpose of this paper is to study the process evaluation of volleyball teacher education reform under the big data, and to build and improve the process evaluation platform (PEP) of volleyball education in China. This paper starts from the theoretical research, through the use of literature review method to investigate a large number of process evaluation related literature, understand the important role of process evaluation, analyze and design process evaluation process. At the same time, it simulates the PEP to get the results of students, and makes clear that the PEP makes up for the lack of teachers' single score, which proves the importance of building a perfect PEP. Experimental research shows that 92% of volleyball teachers think that there is a lack of a complete system of volleyball teaching evaluation program in the process of teaching evaluation, 84% of volleyball teachers think that the current evaluation method still pays attention to the reward and punishment system, another 79% think that the evaluation subject is single, 86% of volleyball teachers think that the feedback effect is poor, and 75% of volleyball teachers think that the school does not pay attention to volleyball teaching. All this shows the necessity of constructing a procedural evaluation platform.