I found solution.
The only thing needed to be done in order to use precompiled header in project is to include
the following statements in .pro file:
CONFIG += nameOfPrecompiledHeader.h
PRECOMPILED_HEADER = nameOfPrecompiledHeader.h
win32-msvc* {
PRECOMPILED_SOURCE = nameOfFileInWhichCreateOptionWillBeSet.cpp /* other .cpp files will be with use option*/
}
after .pro modification and running qmake all .cpp files will be set up for usage of pch and one for it`s creation(nameOfFileInWhichCreateOptionWillBeSet) and .pch will be generated