Energy-saving and environment-friendly on-site treatment system of garbage

The invention discloses an energy-saving and environment-friendly on-site treatment system of garbage. The system comprises a pre-sorting device, a coarse crushing device, a dehydration device and a biological fermentation device, wherein a primary dehydration device is connected with the pre-sorting device; the kitchen garbage is presorted and is subsequently subjected to primary dehydration; a secondary dehydration device is connected with the dehydration device and is used for carrying out secondary dehydration on the crushed kitchen garbage; a tertiary dehydration device is connected with the biological fermentation device and is used for carrying out tertiary dehydration on the fermented kitchen garbage. According to the energy-saving and environment-friendly on-site treatment system of garbage, the primary dehydration device, the secondary dehydration device and the tertiary dehydration device are capable of effectively carrying out dehydration after presorting, carrying out dehydration after crushing a