  We study warm-viscous inflationary universe model on the brane, in a tachyon
field theory. We obtain the general conditions which are required for this
model to be realizable. In longitudinal gauge, the primoradial perturbation
parameters are found in great details, using slow-roll and quasi-stable
approximations. The general expressions of the tensor-to-scalar ratio, scalar
spectral index and its running are found. We derive the characteristics of the
inflationary universe model by using an effective exponential potential in two
cases: 1- Dissipative parameter $\Gamma$ and bulk viscous parameter $\zeta$ are
constant parameters. 2- Dissipative parameter as a function of tachyon field
$\phi$ and bulk viscous parameter as a function of radiation-matter mixture
energy density $\rho$. The parameters of the model are restricted by recent
observational data from the seven-year Wilkinson microwave anisotropy probe
(WMAP7).
