Both reasonable accommodation and accessibility are crucial concepts in the UN Convention on the Rights of Persons with Disabilities. Those two concepts promote each other and should de-velop as a whole. State parties of the Convention undertake immediate obligations to ensure the provision of reasonable accommodation, which has advantages such as characteristics of subjective rights, individualization, justiciability and convenience, making it a flexible tool for the protection of rights. It can serve as a supplement to insuf-ficient accessibility and play a unique role in other areas which are irrelevant to accessibility, so as to satisfy the special needs of certain subjects to the largest extent. Accessibility construction ex ante and progressive obligations of the state party, has advantages of universal design, large scale, economization and no need for individualization consideration. In China, various forms of reasonable accommodation have been applied in employment, but they have disadvantages of con-tingency, randomness, simplicity and lack of systematic support. In the process of further promoting the employment of people with disabili-ties in China, in addition to strengthening accessibility construction, we must fully understand and flexibly adopt reasonable accommoda-tion.