Protecting method of laser-arc hybrid welding

The invention discloses a protecting method of laser-arc hybrid welding. The method includes (a) grounding a laser welding machine, an arc welding machine and a workpiece through a 2 to 6 Omega resistor respectively, and allowing two ends of the resistor to connect to a 10 to 100nF capacitor in parallel; (b) wrapping shielding materials and grounding cables of the laser welding machine and the arc welding machine respectively; (c) prolonging the current rising time of the arc welding machine to moderate current rising slope efficiency while arcing, and strength of high frequency during high-frequency arcing is reduced. The laser welding machine, the arc welding machine and the welded workpiece are grounded through the capacitor and a resistor which are connected parallelly, electrostatic shielding and high-frequency electromagnetic shielding can be achieved simultaneously, and influences on a laser device of the laser welding machine by the high-frequency arc welding machine while arcing can be reduced.