  We propose a new numerical method to compute parton distribution
amplitude(PDA) from the Euclidean Bethe-Salpeter wave function. The essential
step is to extract the weight function in the Nakanishi representation of the
Bethe-Salpeter wave function in Euclidean space, which is an ill-posed
inversion problem, via the maximum entropy method(MEM). The Nakanishi weight
function as well as the corresponding light-front PDA can be well determined.
We confirm the previous works on PDA computation therein the different method
has been performed.
