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Waste management in a selective manner requires the collection of waste, among others, also large-scale. In Poland, in January and February, the collection of biodegradable waste is carried out - Christmas trees. This process is carried out by collecting from the real estate the whole trees, and then transporting them to the utilization place, where they undergo chopping processes. The article discusses the subject of estimating the cutting force when chopping a single-shaft wood chipper of the Caucasian Fir (Abies Nordmanniana). The obtained results of the loads characteristics and values ​​of forces will enable the design of effective chopping machines. They can also help improve the efficiency of the selective waste collection process i.e. Christmas trees by developing mobile chopping machines mounted on waste collection vehicles. They will allow to limit the number of operations in the waste treatment process to collect and transport the shredded biodegradable mass to the processing stations.