The invention discloses an MEMS geophone which comprises a protection shell provided with an upper cover, an MEMS machine core arranged in the protection shell, and a tail cone arranged outside the protection shell. The MEMS machine core comprises a machine core shell fixed into the protection shell, a supporting frame arranged in the machine core shell, and a plurality of MEMD accelerometers arranged on the supporting frame. The supporting frame is cuboid. The MEMS accelerometers are capacitive accelerometers and include the X accelerometer, the Y accelerometer and the Z accelerometer, wherein the three accelerometers are vertically arranged on three adjacent side faces of the supporting frame respectively, and the side face where the Z accelerometer is located is the top face, facing towards the upper cover, of the supporting frame. The tail cone is arranged on a screw which penetrates through a base plate of the protection shell and abuts against the machine core shell. A coil with the fixed frequency is not used in the MEMS geophone, the recordable dynamic range is large, the response bandwidth is wide, the resolution ratio is high, and detection of all broadband elastic waves generated by an artificial seismic source is facilitated.