The present invention belongs to the field of quick prototype technology, including the following steps: firstly, laying a layer of sheet material, then said layer is predivided into several small portion by cutting under the control of computer; adhesion bonding or connecting processes are adopted to make newly-laid layer sheet material firmly-fix on the formed body, cutting out profile of said layer by cutting under the control of computer, cutting off non-part portion; laying a layer of new sheet material again, repeating said operation until said working process is completed, finally removing lattice portion so as to obtain complete prototype part. Said invention can make prototype deformation small, and make the produced part process high accuracy and strength, can be used in field of large-size die manufacture technology.