A carrier selection method for the logistics network is disclosed to evaluate the network reliability of each carrier set for choosing an optimal carrier set. The logistics network includes a start, a terminal and a plurality of routes between the start and the terminal, and a plurality of minimal paths are composed of the routes. The carrier set is composed of carriers chosen in every route of the logistics network. The carrier selection method includes the steps of choosing one carrier for transporting; distributing a demand in the minimal paths, and each carrier having a plurality of capacities and a maximal capacity; calculating a network reliability for the carrier set transporting the demand in the minimal paths according to the demand, the capacities and the maximal capacity; and executing genetic algorithm for searching an optimal carrier set.