We introduce Ward-Schwinger-Dyson equations in the case of phi^3 QFT model in 6 dimensions. The aim of our techniques is to overcome the overlapping divergences appearing in the usual Schwinger-Dyson equation for the propagator. The main characteristics of this system are to be formulated purely in terms of renormalized quantities and to give solutions satisfying renormalization group equations. We show how WSD are intertwined with Renormalisation group, and how the latter is an integral part of any efficient resolution scheme of this system. It is our belief that this method can be generalized to the case of gauge fields.