The invention relates to a discrimination technology of the properties of a pin of an integrated device, in particular to a rapid discrimination technology of the properties of a pin of a programmable logic device (PLD). Firstly, the rapid discrimination technology of the properties of the pin of the PLD adopts static observation to discriminate partial output pins; then dynamic observation is adopted to discriminate the rest output pins; and finally, and a dynamic test is adopted to tell an input pin from a useless pin. A pulsation sensing interface is used when the dynamic test is adopted to discriminate the rest output pins. The pulsation sensing interface comprises a plurality of stream input NOR gates, a plurality of triggers and a power-on reset circuit. The input end of each streaminput NOR gate joins up both ends of resistance on every pin of the PLD in parallel, and the output end of the stream input NOR gate is connected with every trigger. The output end of the power-on reset circuit is connected with the reset end of every trigger. The discrimination technology of the properties of the pin of the PLD provided by the invention has accurate discrimination and high efficiency.