The invention discloses a recyclable microseism sensor of which the composition mainly comprises a microseism probe, a holding part, a supporting plate which is supported on a borehole wall surface and a connecting mechanism which is used for connecting the holding part and the supporting plate. The connecting mechanism comprises telescopic springs which are arranged in spring sleeves and sleeve outside spring guide rods, a first plug pin which vertically penetrates through the walls of the spring sleeves to be used as the lower end spring bases of the telescopic springs and a second plug pin which vertically penetrates through the walls of the spring sleeves and the spring guide rods. The microseism sensor is arranged in a monitoring borehole. The first plug pin is pulled out, and the lower side surface of the microseism probe and the supporting side arc plate surface of the supporting plate are effectively coupled with the internal wall of the monitoring borehole under the effect of the telescopic springs so as to monitor the vibration of the rock mass. The microseism probe and the supporting plate are connected as a whole by the connecting structure so that the locating and recycling problems of the microseism sensor can be solved, the problems of effective installing and coupling of the microseism sensor can also be solved, the microseism sensor can be repeatedly used and thus the production cost can be reduced.