Abstract: The perception of hydraulic support pose and loading information was the foundation of self-adaptation control，according closed loop vector movement equation，and mechanics state of roof beam and shield beam were analyzed，then the mathematics relation between column，oil pressure of balance jack，support pose parameters and roof beam loading was put forward，and the mathematics model of hydraulic support pose that based on cylinder pressure and loading information inversion.It taking hydraulic shield support of ZY12000/28/64 as studying objects.According results comparison of ADAMS model and the mathematics model，the effectively and precision were verified by it.The model would proved technical supporting for self adaption control.