Abstract: In order to solve the problem that the data change rhythm of each hydraulic support is not unified and it is difficult to analyze the roof movement law during the continuous monitoring of pressure and analysis of the hydraulic support. The pressure monitoring results of hydraulic supports are analyzed. Findings: the pressure of the hydraulic support shows a “W” type distribution of larger pressure in both ends and the largest pressure in the middle when the old roof is broken. The pressure behaviors of this kind of face inclination bring great disturbance for analyzing motion laws of single support roof. The face is divided into upper, middle and lower zones according to crack features of face inclination. After screening the cyclic data conforming to the pressure criterion according to the method of analyzing single support roof movement law, fitting by time series, we determine whether it conforms to the pressure conditions again. This is multi-support joint analysis technology for roof movement laws. Practice has proved that the roof movement law based on multi-support joint is basically consistent with field observation results.