Disclosed in an embodiment of the present invention are a method for controlling network transmission and a related apparatus. The method is applied to a system for controlling network transmission. The system for controlling network transmission comprises a source node apparatus, a first node apparatus and a second node apparatus. The method comprises: the first node apparatus receiving a first message from the source node apparatus, wherein the first message carries Internet protocol operation and administration and maintenance (IP OAM) information, and the IP OAM information comprises an IP OAM command; the first node apparatus generating, according to the first message, a second message; and the first node apparatus sending, to the second node apparatus, the second message, wherein the second node apparatus is a next-hop node apparatus of the first node apparatus. Accordingly, automatic collection of OAM information about all the node apparatuses on an E2E path is realised, the OAM efficiency is improved, and control over the stability of network transmission is further improved.