Abstract: Based on the theory of infinite plate on the elastic semi-infinite foundation, the calculating principles of equivalent single wheel load (ESWL) for airport rigid pavements were described in this paper, and two sets of charts were presented, one of which can be used to determine the ESWL of dual or dual-tandem wheel gear loads, and the other can be used to determine the ESWL of single wheel gear load with standard tyre pressure from those with arbitrary tyre pressure.