The present invention provides a method used for in-field self-curing in equal-cost multipath in a network. The method is used for coping with a single malfunction in equal-cost multipath field in telecommunication network. The method according to the invention calculates the backup resource which requires to be reserved in the operation path beforehand, confirming a Hash function and key code corresponding to each operation path, expanding signaling information, and repositioning the service on the fault path to other operation sub-paths through a mode of Hash function again when a fault occurs. The method according to the invention effectively uses the topological characteristic of equal-cost multipath of ECMP field, and combines the establishing of the operation path and the reserving of backup resource, reduces the processing operation of node and the using number of the label, and at the same time realizes the in-field self-curing of ECMP field.