Flow maldistrbution exists in plate-fin heat exchanger due to its complicated interior structure and it would cause the deterioration of heat exchanger’s efficiency.Many factors could cause fluid flow nonuniformity in the plate-fin heat exchanger.The objective of this paper is to investigate the effects of different distributor configuration parameter(h/H) on the fluid flow distribution in plate-fin heat exchanger.It is found that the effect of different distributor’s(h/H) on flow maldistribution in plate-fin heat exchanger mainly exists in the parallel direction of gross flow passage.A change in the distributor’s h/H can make the flow distribution more uniform in the parallel direction of gross flow passage.To optimize the configuration of distributor can effectively improve the flow distribution in plate-fin heat exchanger.The conclusions of this paper are of great significance in the optimum design of plate-fin heat exchanger.