Due to the growing environmental threat associated with the accumulation of plastic waste, the development of biodegradable polymers based on low‐density polyethylene with the addition of natural fillers is of great importance. At the same time, the experimental studies of such materials require a huge amount of time: the production cycle from the development of a new formulation of a biopolymer to market launch can take up to 36 months. To reduce this time, a new approach based on mathematical modeling is proposed. Verification of this approach is carried out using the example of low‐density polyethylene composites with natural rubber filler. The high accuracy of the proposed mathematical models for predicting the properties of biodegradable polymers is shown.