@Lee-Coder OK, I fixed this problem.
If you have the same problem,maybe this topic can help you.
If you import QtQuick.Controls 2.0 or QtWebEngine 1.x, the cmd command "windeployqt xxx.exe --qmldir xxx" can not auto copy required qml folder, you must manual copy qml folder,like this:
QtQuick.Controls 2.0 - %you qt path%/5.7/msvc2013_64/qml/QtQuick/Controls.2,copy all folder in your dynamic compiler project,eg:%dynamic compiler project%/QtQuick/Controls.2
QtWebEngine follow the same steps specified above.
OK~it's work!
thx~