Aiming at the problem that the actual response time of the existing data analysis system is too long, a data analysis system of College Students' physical fitness test is designed under the support of association rules. Build the hardware structure of the system, design the data acquisition circuit, control the power output of the hardware circuit, optimize the data acquisition process of College Students' physical fitness test; This paper constructs the association rules of physical health, uses the dichotomy model to control the function threshold, and combines Java technology to divide the college students' physical health data analysis system into login module, data management module, data analysis module and data callback module, determines the physical test data set, and generates the actual health data analysis rules, Complete the analysis of College Students' physical fitness test health data. The experimental results show that: after a data analysis, the number of distinguishable data items is equal to the actual health data items, and the system response time is the shortest.