Metallic film coated composite materials, which are with heat-resistance, anti-radiation and low rate of expansion properties, are one of the base materials for electro-magnetic wave transportation controlling when applied to aeronautical, astronautical and signal delivery fields. To accurately etch the top metal film pattern without damaging the base composite materials is required. This article systematically studied the effects of key laser parameters with ultrafast laser and their performance on etching results. It is found that aluminum film could be removed with laser parameters of energy density 3.80 J/cm2, pulse overlap 60% and 3 times of overscan by using a 100 kHz, 480 fs and 1 030 nm laser source. These findings will not only contribute to the aluminum-silica fiber structure materials etching but also help to guide similar wave-transparent materials ultrafast laser processing.