Now my project seems only see the 1st library, but complains can not found other libraries. I've add all other libaries include path .I am use mt2523 chip. I've also add all libraries(.a file) to my project.
The linker will try to bind everything you give to it, success might depend on the ELF/AXF files describing a consistent chip, ABI, version, model, etc.
What might happen is you create a much larger list of dependencies, or inter-dependencies, which either require other libraries not provided or compatible with Keil, or where you've got to provide wedge or shim code to map to Keil equivalent functions to get closure.