A data processing method for an NOC without buffer and an NOC electronic element are provided. The method includes: receiving multiple packets by a routing node in one processing period, where the plurality of packets need to be transmitted to a same forwarding port; acquiring priority information of the multiple packets and determining priority levels of the packets based on the priority information, where for each packet, the priority information includes time length information of the packet and program priority information of a program corresponding to the packet, and the time length information of the packet represents a time period during which the packet is remained in the NOC; and forwarding a packet having a highest priority through the forwarding port. The method and the NOC electronic element are applied to data processing for the NOC without buffer.