Abstract: Dimensioning of combination solid is difficult in engineering drawing teaching, so it has a
very important significance to explore an effective teaching analysis method. It requires students to
dimension combination solid accurately, perfectly and clearly, but the current teaching method cannot
guide them how to do it. A new teaching analysis method is presented in this paper about how to
dimension the overlapped combination solid. Finally, three principles of dimensioning of overlapped
combination solid are raised by the analysis of classifying overlapped combination solid and
expanding the definition of dimension. Three principles presented in the paper are very useful and
they can guide students to choose the size dimension and location dimension of basic geometric body
correctly while using analytical method of shape to dimension overlapped combination solid. So a
correct, complete dimensioning effect can be achieved.

Key words: overlapped combination solid, dimensioning, analytical method of shape, teaching
analysis method