A node connection chip communication circuit comprising a first node connection chip (01) and a second node connection chip (02). The first node connection chip (01) has a signal connection to and engages in data communication with the second node connection chip (02). Either a transmitter unit (23) or a receiver unit (22) of a data port (2) is controlled by a microcontroller (1) of the node connection chips to be valid, thus respectively setting the first node connection chip (01) and the second node connection chip (02) as a master chip and a slave chip, providing adjacent node connection chips with a data communication link, transmitting detailed node connection chip information via a node connection chip data communication circuit, and rapidly providing the node network with detailed node information.