In this research, we combine Buckley's Fuzzy AHP method with Harker's branch freezing rule (BFR) to set up the model for trust fund portfolio selecting. This revised model helps improving the efficiency by reducing the numbers of pair-wised comparisons in the questionnaire when the size of the hierarchy increases. By comparison with Buckley's fuzzy AHP model, our revised model shows great saving on the performance of decreasing the expert's questionnaire.