The invention relates to a flow distribution valve for a load-sensitive pump system. The flow distribution valve is characterized by comprising: a valve block that is provided with an oil inlet, an oil outlet, a main oil outlet and a return oil port; a first passage wherein a preferential compensation spool is arranged in the first passage; a first main screw plug that is provided with a load pressure feed port and a one-way spool; a two-position two-way electromagnetic valve for switching connection of a main control cavity with the return oil port or the main oil outlet; an overflow valve component that is opened after the pressure in the main control cavity reaches a certain valve, wherein the main control cavity is communicated with the return oil port; a flow adjusting valve componentarranged on the valve block for controlling discharge flow of the main oil outlet. The flow distribution valve is simple and reasonable in structure and convenient to process, allows an auxiliary operating device to be conveniently connected to the flow distribution valve in the load-sensitive pump system, and is compact in size and low in cost.