The invention discloses a method for manufacturing a soft and hard composite board, which comprises the following steps of: firstly, separating a hard board into a plurality of sub-boards by cutting; secondly, arranging a semi-cured film between a good sub-board and a soft board; thirdly, pre-bonding to position the relative positions of the good sub-board and the soft board; and finally, performing thermocompression bonding to fix the semi-cured film between the sub-board and the soft board so as to form the soft and hard composite board. In a subsequent process, the soft and hard composite board can be cut to be separated into a plurality of sub soft and hard composite boards.