The invention relates to a 3D model mould, particularly a 3D hand-made model making mould for architectural teaching. A downward concave mold cavity (2) is arranged on an upper surface of a mold plate(3), a plurality of blocks (1) fill the mold cavity (2) through a single-layer horizontal placement, and a magnet B (15) is respectively embedded in each block (1). A magnet A (8) correspond to a magnet B (15) of each block (1) in a molding cavity (2) of a molding plate (3) is fixed on a bottom plate (4) arranged on a lower surface (5) of the molding plate. The block body (1) in the shaping cavity (2) of the shaping plate (3) forms a three-D hand-made model of architectural teaching to make a mold according to a part lacking in design shape. The mould controls the magnet B in the shaping plate body through the magnet A of the bottom plate to form the designed shaping cavity shape of the block, obtains the three-D manual model from the target soil finalization, and facilitates the cognition of the students in the teaching.