The invention relates to an impermeable membrane structure of a house refuse landfill, in particular to an impermeable membrane anchoring structure at the middle part of a side slope of an abrupt and hard rock side slope single-layer impermeable structure, which comprises a bed rock side slope, a sodium GCL (Geo-synthetic Clay Liner), an impermeable high-density polyethylene (HDPE) membrane, a geotextile bagged pebble bed and an anchoring HDPE membrane, wherein the impermeable HDPE membrane positioned on the sodium GCL is closely and fixedly connected with the front section of the anchoring HDPE membrane through thermofussion welding, a bending sheet formed by bending downwards the anchoring HDPE membrane and the sodium GCL are fixedly connected to the bed rock side slope through expansion bolts; and the geotextile bagged pebble bed is positioned on the impermeable HDPE membrane. The invention solves the technical difficulty of anchoring the impermeable membrane by the refuse landfill arranged at the rocky area of the current rock side slope, especially the hard rock side slope, and has the advantages of simple structural form, safe and convenient construction and reliable quality.