The invention relates to a grass
cutting machine, which comprises a
host machine, a switch, a push rod, a
switch box, an operation element and a safe key, wherein the operation element is connected with the
switch box, and is provided with an operation position and a resetting position, the operation element is maintained in the operation position when being operated by an operator and is positioned in the resetting position when being not operated, the safe key is detachably arranged in a lock hole formed in the
switch box, the safe key is provided with an operation position and a resetting position, the safe key is maintained in the operation position when being operated by the operator and is positioned in the resetting position when being not operated, when the safe key is switched to the operation position, the action of switching the operation element to the operation position is allowed to trigger the switch to be conducted; when the safe key is positioned in the resetting position, the action of switching the operation element to the operation position is forbidden to trigger the switch to be conducted, the safe key and the switch box are integrated, the effect of starting the grass
cutting machine only through operating two components on the push rod is achieved, the
safety regulation is met, and meanwhile, the operation and the control are convenient.