Thank you for your reply, I reinstalled "pixhawk_toolchain" in default path and it worked, but there are also some problems.
I can get the ArduCopter-v2.px4 in the file, but it not worked when I upload the ArduCopter-v2.px4 file to the chip.
my chip is level, but the status in mission planner is not. So strange!
Sorry to trouble you again, but I believe you konw the answer!