Guys. Can you help me?
I want to read SD Card using Arduino Mega1280, but I have some problem. May I want schematic and source code about SD Card using Arduino Mega 1280? Thanks a lot 
I want to read SD Card using Arduino Mega1280, but I have some problem.
What problem are you having? Do you have some sort of breakout board or shield? If so, which one?
May I want schematic and source code about SD Card using Arduino Mega 1280?
There is a library, SD, provided that reads from/writes to SD cards. There are even examples. Use the library, study the examples and the source code.
The schematic for your SD card reader/writer depends on WHICH SD card reader/writer you have.