The invention discloses a universal implementation circuit for NFC, and a chip. The circuit comprises a downlink circuit, wherein the output end of the downlink circuit is connected with the input endof a protocol processing circuit, and the downlink circuit is used for configuring a label forming mode, a card reader mode or a point-to-point mode according to a downlink mode control signal of theprotocol processing circuit, processing a downlink signal to form downlink data and outputting the downlink data to the protocol processing circuit; the protocol processing circuit, wherein the output end of the protocol processing circuit is connected with the input end of an uplink circuit, an uplink circuit mode control signal output end of the protocol processing circuit is connected with thecontrol end of the uplink circuit, and the protocol processing circuit carries out the protocol processing of the downlink data to generate corresponding downlink data, and outputs the uplink data tothe uplink circuit; and the uplink circuit which is used for configuring a label forming mode, a card reader mode or a point-to-point mode according to an uplink mode control signal, carrying out theprocessing of the uplink data to generate an uplink signal, and outputting the uplink signal. The circuit achieves three working modes of NFC through one channel, and improves the compatibility, integration level and adaptability of NFC.