Component-based software engineering (CBSE) has been proven to be effective in the development and management of distributed software systems. Currently, some challenges appear when building time-critical applications for the distributed systems based on current component technologies. The remaining issues that components themselves have not undertaken are the two key characteristics of distributed real-time systems: timing properties and dynamic properties. To solve the issues and facilitate the development of distributed real-time applications in client-server computing pattern, this paper proposes a kind of reflective design for component-based distributed systems with timing constraints. At the end, an example is given to validate the design. Experimental results show that an application’s timing properties can be met by adopting this design approach and dynamic properties have been achieved by dynamically adjusting components on demand.