The invention discloses a hand-held cutting machine. The hand-held cutting machine comprises a support, a rotary base, a second handle, a switch, backers, a connector, a first motor, a connecting rod, a central shaft, a blocking cover, a protective cover, a saw blade, a starting button and a first handle, wherein the rotary base is arranged in the middle of the top of the support, the switch is arranged on one side of the rotary base, the second handle is arranged on one side, away from one side of the rotary base, of the switch, the backers are arranged on two sides of the top of the rotary base, and a gap between the corresponding one sides of the backers on two sides is located above a gap in the middle of the top of the rotary base. The hand-held cutting machine has the advantages that effective collection of dust generated during cutting is facilitated greatly, air pollution caused by the dust is reduced, harm of the dust on the eyes and bodies of workers is reduced, cutting work efficiency is increased, cutting errors and damage caused by the dust are avoided, and cutting precision and trimming integrity are increased.