Abstract: A type of fireproof fabric with both excellent fire retardant properties and good mechanical properties was prepared by dipping ordinary viscose fabric into a suitable fire retardants with suitable impregnation process at a certain temperature . The effects of processing temperature, time and tension on fire retardant properties and mechanical properties of the fireproof fabric were investigated to determine the optimized processing parameters, thus a fireproof viscose fabric with optimal combination property was obtained. Results showed that the fabric processed with organic silicon compound catalyst at 240 ℃ under a tension of 3.92N for42 min had optimal combination property.