Automatic solar grass cutter reduces the effort required for cutting grass in the lawns. Also, solar power will be used to provide the driving force for the cutter and the various sensors will be used to detect and avoid the unnecessary objects in the field during operations. This system also operate on a battery that will also be charged through solar energy rather than using any external power. In this ultrasonic sensors are also used to detect any object/human/or animal while cutting the grass so to avoid them. It consists of microcontroller Arduino ATMEGA328U, LCD display for better response and understanding to the user. This paper will project the operation and working principle of the automatic grass cutter.