The invention relates to an intelligent flow table updating method, in particular to an intelligent flow table item updating method based on an openflow switch. The method comprises the specific steps that an ordered queue (entry_queue) is established according to existence values of table items, and the ordered queue is used for storing the volumes, occupied by all the table items, in a memory; the use condition of a memory at the switch end is monitored, and when occupation of the memory of the switch does not exceed the maximum value mem-max of the memory, the updating time interval of the ordered queue is detected; the updating time interval of the ordered queue is judged, and when the updating time interval of the ordered queue reaches a preset value, new existence values of the table items are calculated, and the ordered queue is updated. Through the intelligent flow table updating method, a more intelligent and efficient flow table updating mechanism is realized; on the basis of guaranteeing conformity to a controller removal strategy, the actual running condition of the switch end is fully considered, and a more intelligent and efficient flow table updating strategy is realized.