The invention provides a fracturing method for an artificial crack of low damage and high flow conductivity of a coal-bed gas well. The fracturing method comprises the steps that (1) a thickener is prepared; (2) fracturing liquid is injected through a high pressure pump; (3) the viscosity of the fracturing liquid is increased; (4) a proppant is added; (5) the viscosity of the fracturing liquid is reduced; (6) the viscosity of the fracturing liquid is increased, and the concentration of the proppant is increased; and (7) working is finished. The fracturing method has the characteristics that the viscosity of the fracturing liquid can be controlled in real time in the whole process of coal bed fracturing construction, the success rate of construction can be effectively improved, reservoir damage is reduced especially for the low young modulus property of a coal bed, high sand ratio adding of coal bed fracturing can be realized by controlling the viscosity of the fracturing liquid, and the flow conductivity of the artificial crack in the coal bed is improved.