Abstract: There frequently occur the coal wall spalling and the roof subsidence during coal mining process, in view of the hard and thick coal seam in Bayangol coal mine, taking 311305 work face as the engineering background, and YDD-16 type acoustic and electrical monitoring device are used to monitor the dynamic change of coal seam roof, and 40 advanced measuring points are arranged in the air return way and transportation way advanced work face area 400 m respectively.The relationship between the change of acoustic and rockburst is studied.The conclusions are as follows:the acoustic and electrical monitoring waveform curve can well reflect the distribution characteristic of the advance support stress of mining face, the acoustic and electrical signal has a significant increase trend when periodic weighting in coal mine face; fuzzy mathematic is applied to set up the acoustic and electrical signal threshold value of 311305 mining face, the acoustic and electrical threshold value is 168 mV and 28 mV, respectively; and the research results provide a scientific basis for the study of rockburst monitoring and early warning.