Level of repair analysis (LORA) is an important part of maintenance engineering analysis for amphibious aircraft wading structures. There are many researches mainly focusing on LORA of civil aircraft, shipboard aircraft, vehicles, ships and so on in the domestic and overseas, while researches on LORA of amphibious aircraft wading structure are few. Based on this, this paper studies the process and method of LORA for the wading structure of amphibious aircraft. In this paper, a three-level repair model of the wading structure is established. The LORA process of the wading structure is proposed. An economical LORA (ELORA) model for three-level repair of wading structures is established, and the cost factors to be considered for ELORA are given. Finally, the approach switch on the wading cabin door of an amphibious aircraft is taken as an example to carry out ELOR, the calculation results demonstrate the engineering suitability of the proposed method in LORA.