  In the large extra dimensional braneworld inflation, Friedmann equation is
modified to include a quadratic term in energy density with an additional
parameter $\lambda$ called brane tension in addition to the usual linear term.
The high energy brane corrections modify the slow-roll parameters and affect
the behaviour of inflation. We analyse the superconformal inflation for
E-models and find that there exist $\alpha$-attractors in brane inflation. The
predictions for the scalar spectral index $n_s$ and the tensor-to-scalar ratio
$r$ are computed numerically, and approximate analytic formulas in the high
energy limit have been given for the observable $n_s$ and $r$. The constraints
on the model parameters are obtained by using Planck 2018 and BICEP2
observational data.
