In order to study large inclined angle fully mechanized caving face mine pressure behavior law, the actual mine steeply inclined fully mechanized caving face field monitoring research was conducted. According to the monitoring data analysis, upper working face pressure was biggest, the lower minimum, same with pressure step, in the meantime, it was concluded that the slower the working face advancing speed, the greater the working resistance of support, which provided technical experience and reference for large inclined angle fully mechanized caving face support selection.