In order to study the technical problems in the mining of irregular working face and the law of underground pressure in the mining process, take the 81308 fully mechanized caving face of Baode Coal Mine as the background, this paper uses theoretical analysis, numerical simulation, and field tests to study the technology of end equipment lapping, mining technology, and rock pressure law in rotating face mining. The research results show that: the method of segmented broken line driving can ensure the equal length layout of working face; the end bracket and the transfer machine need to be offset by 5° to the outside to ensure the smooth overlap of the front scraper with the transfer machine and the combined bracket; the continuous advancement of the working face is realized through the solid rotation method and the combination of long and short cutters. There is asymmetrical distribution of stress, displacement and plastic zone in the process of tilt adjustment. As the tilt adjustment progresses, the asymmetry phenomenon weakens, and the roadway on the working surface should be the focus of control; after the tilt adjustment, the asymmetry basically disappears.