Disclosed is a grass protection mat for soft ground, comprising: an upper mat comprising a first body in which first grass passing spaces are continuously arranged and a first outer frame formed to finish an outer edge of the first body； and a bottom supporting mat which is arranged under the upper mat, wherein the bottom supporting mat comprises a second body in which second grass passing spaces are continuously arranged, and one or more hook fasteners which protrudes from the second body at a predetermined position corresponding to the first outer frame of the upper mat so that it is hooked to and coupled with a portion of the first outer frame.
