The invention discloses a roof plate disaster monitoring device. By adopting the roof plate disaster monitoring device, not only is a tunnel roof plate monitored in real time, but also deformation andsliding of a tunnel rock layer above the tunnel roof plate can be monitored in real time, the pre-judgment time for tunnel support roof plate disasters can be greatly prolonged, and safe operation ofcoal production can be ensured. As deformation of a rock layer is converted into deformation of a monitoring sleeve or a roof plate sleeve, furthermore radial deformation of the monitoring sleeve andthe roof plate sleeve can be monitored, a rock layer sliding phenomenon of the top of a tunnel can be judged in advance, support can be effectively improved, or corresponding measures for preventingroof plate disasters can be taken, the coal operation stability can be improved, and the coal exploration efficiency can be ensured.