1. Compile with components: directly import qt source files instead of precompiled versions, and control the size of required components.

2. Using static compilation, generally speaking, the static library is smaller than the dynamic library.

3. I checked qtGui4.dll's 9.67m, where there is more than 100 m ... plus QtCore4.dll's 2.5m, these two are commonly used, just over 12M. Are you using a debug version of the library? The GUI alone has172m ... ...

4.qt can be used in embedded systems, so it provides the function of component clipping. You can also look up information or compile the Qt library manually.