The invention relates to a method for manufacturing a non-rectangular sheet-shaped vacuum insulation plate, which solves the difficulty of manufacturing non-rectangular sheet-shaped vacuum insulation plates in the production and manufacturing process of vacuum insulation plates (VIP). The method for producing the non-rectangular sheet-shaped VIP comprises the following steps of: (1) cutting a VIP core into the required shape (sheet-shaped non-rectangular by a mould; (2) placing the shaped VIP core in a high-blockage film; (3) packaging into a VIP primary form by an abnormal-shaped thermal welding tool; (4) placing the VIP primary form in a vacuum machine for vacuum treatment; (5) secondarily packaging the VIP subjected to the vacuum processing; and (6) carrying out die cutting on the abnormal-shaped VIP, wherein the heat conduction coefficient is smaller than 0.005w/mk; and the density is 300kg/m<3>-350kg/m<3>.