The invention discloses a node communication state monitoring method based on PRP (Parallel Redundancy Protocol) and HSR (High-availability Seamless Redundancy) networks. The method comprises the following steps: maintaining messages received from a port A and a port B of a node through a state monitoring module in a link redundancy control module according to feature values respectively, and updating a node communication table; and converting node communication table items into actual physical or logical links through a state presentation module in an upper-layer application according to the feature values of the node communication table, and maintaining and presenting corresponding communication states. Through adoption of the node communication state monitoring method, timely, effective and fine monitoring of a network node communication state is realized, and the reliability and maintainability of network communication are improved.