From the point of view of revitalization of agrarian processes in our country, the perspective of its development showed us that animal husbandry remains one of the priority sectors, which is due to the production of animal husbandry products. Based on this, the problem of producing rough feed for mining conditions remains a problematic issue in small farms and peasant farms, where it is impossible to use large-capacity machines and food production is still done manually. The purpose of the research is the methodology of calculating the internal dynamic processes of a small power hand motorized rotary mower during the start of the mowing work process. The scientific paper presents the dynamic load of a small power hand motorized mower at the moment of starting mowing, which is highly dependent on the work of the working body, so as to perform the mowing process with quality and less losses.