The invention relates to production method of a doped silica glass fiber comprising doping one or two mixtures with a total content 0.01-0.4% of the silicon dioxide substance amount in the quartz sand of the alumina and gallium oxide into a quartz sand with a purity more than 99.90% by a special doping technology, melting the mixture by an electric heating mode to draw into fine quartz glass rod, drawing the quartz glass rod into a quartz fiber which has a higher viscosity at 1200 DEG C than the normal quartz glass fiber. The method solves the problem that in the prior art a layer heat-resistant material is closely coated on the surface of the fiber, but the ideal coated fiber can not be obtained after drawing, besides the excellent electrical property of the quartz glass fiber is reduced. The production technology of the invention is simple, the prepared quartz glass fiber has a good temperature-resistant property, at the same time the other excellent property of the quartz glass is not reduced. The method is suitable for producing quartz glass fiber with good temperature-resistant property.