Hi zhangjing711@126.com,
The NXP Model-Based Design Toolbox is free of charge but it still require you to own a license to work.
The license can be downloaded for free your NXP account.
How to get and install the license procedure is shown in this video: Video Link : 7692 starting with 3'15" (same video is also available on YOUKU)
Short tutorial below:
Step 1: Log in into your NXP's account;
Step 2: Select the MBDT link you wish to generate the license for:

Step 3: Select the License Keys Tab:

Step 4: Select the available license and click on generate

Step 5: Open a CMD and type "vol c"

Step 6: Add the information about your setup and generate the license

Step 7: Generate and save the license on your PC into the ...\mbdtbx_MPC574xP\lic folder

Step 8: Restart MATLAB and have fun!!!
A longer version of the NXP's licensing can be found here.
Hope this helps!
Daniel