Automatic protection method of Ethernet

The invention relates to one Ethernet automatic protection method, which comprises the following steps: selecting one host ring in network topological structure; if there is aid ring, annealing it into direct or indirect connection on each layer section linkage; main ring host point tests and switches according to host ring linkage status change for ring fault or restore business reverse; each layer section main point tests and matches with relative aid fault or restore business inverse on section linkage terminal points.