Extensively used plastic mulch film causes tremendous environmental pollution. Developing biodegradable mulch film represents an emerging demand for future agriculture. Bone gelatin (BG) has emerged as promising candidates in the field of biodegradable agricultural mulch film due to its eco-friendly and biodegradable attributes, yet the terrible mechanical properties and hydrophobicity are great challenges. Here, aminodimethylsiloxane/POSS polymer/bone gelatin (PDMS-NH2/PAH/BG) mulch film was prepared by incorporated POSS-allyl glycidyl ether hydroxyethyl acrylate polymer (PAH polymer) and aminodimethylsiloxane (PDMSNH2) into the BG. The effect of PDMS-NH2 dosages on performances of PDMS-NH2/PAH/BG mulch film was explored. When the PDMS-NH2 dosage was 4 %, the mulch film had a water contact angle (WCA) of 128 +/- 1 degrees, tensile strength (TS) of 5.93 +/- 0.81 MPa, and elongation at break (EAB) of 361.38 +/- 25.04 %. After being buried in the soil for 60 days, the degradation rate of mulch film reached 78 %. Additionally, it also had favourable light transmission, water vapor barrier and moisture retention and insulation performance. Pot experiment showed that the wheat seeds germination rate covered mulch film was 98 % and it could promote the growth of seedlings. The results indicated that PDMS-NH2/PAH/BG mulch film could serve as a biodegradable mulch film to boost crop yields, inspiring advancements in green ecological agriculture.