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The unitarity corrections to the propagator of reggeized gluons calculated inthe framework of QCD RFT require a knowledge of the expressions for Reggeonpropagator and vertices of interaction of three reggeized gluons (Reggeons) toone QCD loop precision, see \cite{Our6}. In this paper we calculate the vertexof interactions of $A_+ A_+ A_-$ Reggeon fields, i.e. vertex of transition of$A_-$ Reggeon field to $A_+ A_+$ fields, to this precision. We demonstrate,that all loop leading logarithmic order contributions to the vertex can besummed through the integro-differential equation similarly to the BFKL one,\cite{BFKL}. The solution of this equation leads to the reggeized from of thevertex with the trajectory twice larger then the trajectory of reggeized gluonpropagator. The application of the obtained result is also discussed.

On reggeization of vertex of three reggeized gluons in high energy QCD