Lawn mower with protective device convenient to replace

The utility model discloses a mower convenient for replacing a protective device, which comprises a control rod, and a protective mowing structure and a supporting structure are arranged on the control rod; the protective mowing structure comprises a power protective shell, two semi-annular buckle frames, a fixing base, a protective cover and a cutting part. The power protection shell is installed on the control rod, the two semi-annular buckle frames are symmetrically and movably attached to the outer side wall face of the power protection shell, and the fixing base is movably installed at one ends of the two semi-annular buckle frames through the two rotating pins. A protective cover in the protective mowing structure is buckled on the power protective shell through two semi-annular buckle frames, dismounting and mounting are convenient, when the protective cover is replaced, a cutting cutterhead in the protective mowing structure is far away from the control rod, the gap between the protective cover and th