The chemical non-equilibrium viscous shock layer flows over a teflon ablative wall are calculated numerically. The coupled solutions of the chemical non-equilibrium viscous shock layer flows and the teflon ablative procedures are obtained through space-marching and global iterations. The overall teflon-air chemical system used consists of 19 species and 29 reactions. The effects of the equilibrium catalytic and the noncatalytic wall conditions on the ablative flows are discussed.