That is a very different and innovative motor placement.
Take a look at this:
https://discuss.ardupilot.org/t/what-setup-should-be-used-for-this-type-of-drone/27788/4
It explains which source code file to change to get your new frame to work.
It should only require aprox. 20 lines of code to get it to work 
thankyou very much for your suggestion！
You will need to read that file and add a new type, yours.
That file explains how the parameters work.
OK，thankyou, I will read it!