  We consider a recurrent random walk on a rooted tree in random environment
given by a branching random walk. Up to the first return to the root, its edge
local times form a Multi-type Galton-Watson tree with countably infinitely many
types. When the walk is the diffusive or sub-diffusive, by studying the maximal
type of this Galton-Watson tree, we establish the asymptotic behaviour of the
largest local times of this walk during n excursions, under the annealed law.
