The embodiments of the present invention provide a method and an apparatus for selecting path in a network, the method comprising: receiving, by a PCE, a PCReq message transmitted by a PCC or another PCE, wherein the PCReq message is used to request a path, the PCReq message includes a Backward Recursive Path Computation (BRPC) flooding flag and identifiers of leaf nodes which are on the path; removing, by the PCE, an identifier of a leaf node existed in a domain where the PCE is in from the PCReq message, when at least one leaf node of the leaf nodes does not exist in the domain; and forwarding, by the PCE, the PCReq message with the identifier of the leaf node in the domain removed, to other PCEs in all adjacent domains. According to the method of the embodiment of the present invention, a BRPC flooding mechanism is used to compute inter-domain TE LSP when destination domain or domain tree is unknown, this mechanism requires least changes in PCEP architecture or other components, and reduces the computational complexity.