Abstract: Based on the classical theory of mine pressure and a large number of field data, this paper proposed area support conjoint analysis technique and waveform self-correction technique to realize disaster prediction and early-warning of working face roof. The technology used support working state analysis and applied computer with powerful data processing function to determine periodic pressure through the pressure criterion of more than half the supports in the patial work surface region and to predict periodic pressure waveform through the statistic, analysis, reasoning and correction of roof movement law in the production process. Finally, this technology completed the accurate analysis and prediction of the roof movement law and alarmed people before the danger occured and reduced the roof disaster.