Three groups of fabricated bridge piers with different connection methods were established， and plasma-modified carbon nanotube（P-CNT） concrete was used at the connection nodes. Under the action of low cycle reciprocating load， the resistance value changes of P-CNT concrete at the connection nodes of three groups of assembled bridge piers under stress were studied， and the possibility of applying P-CNT concrete to intelligent monitoring at bridge pier nodes was verified. The results show that the P-CNT concrete shows good mechanical properties and pressure-sensitive properties under the three connection methods. When the concrete at the connection node is cracked or separated， its resistance value increases suddenly. The incremental change rate increases with the degree of concrete failure at the node. It shows that the application of P-CNT concrete smart material to the connection nodes of prefabricated piers can effectively monitor the stress state at the nodes.