A plate pressing type laminator comprising a lift driving device and a plurality of plate-shaped pressing members which are sequentially arranged from top to bottom, wherein a chamber for accommodating a workpiece is formed in a space between every two adjacent plate-shaped pressing members when they are pressed against each other, the chamber forming a pressing layer; and the lift driving device drives the plurality of plate-shaped pressing members to press against one another or move away from one another and provides a pressure for mutual pressing, and the workpiece is pressed through the pressure between the plate-shaped pressing members; and the laminator is provided with a vacuumizing interface and a vacuumizing channel, the vacuumizing interface and the vacuumizing channel for being connected to a vacuumizing device, so as to vacuumize the chamber; it further comprises an upper cover, a base and an upright post, wherein the upper cover is located above an uppermost plate-shaped pressing member, the base is located below a lowermost plate-shaped pressing member, and each plate-shaped pressing member is connected to the upright post in an up-and-down sliding manner through a sliding connection structure; the lift driving device drives the upper cover and the base to get close to each other to drive the plate-shaped pressing members to press against one another, so as to enable the pressing layers to be closed for pressing; an elastic member is arranged between adjacent plate-shaped pressing members, wherein the elastic member is an elastic sealing member, and when the adjacent plate-shaped pressing members press against each other, the elastic member completely or intermittently seals the chamber formed by the space between the adjacent plate-shaped pressing members; the laminator further comprising a closing positioning and supporting device, which supports each plate-shaped pressing member when the pressing layer is closed; wherein the closing positioning and supporting device of a plate-shaped pressing member located in the middle comprises a jacking block and a jacking oil cylinder or air cylinder, a cylinder body of the jacking oil cylinder or air cylinder is fixedly arranged on the base, the jacking block is respectively arranged in a position corresponding to the jacking oil cylinder or air cylinder, on each plate-shaped pressing member located in the middle, and when the pressing layers are closed, a cylinder rod of the jacking oil cylinder or air cylinder jacks the jacking block of the corresponding plate-shaped pressing member; and the closing positioning and supporting device of the uppermost plate-shaped pressing member comprises an oil cylinder or an air cylinder, a cylinder body of the oil cylinder or the air cylinder being fixedly arranged on the upper cover, and a cylinder rod of the oil cylinder or the air cylinder being fixedly connected to the uppermost plate-shaped pressing member. and the laminator is provided with a vacuumizing interface and a vacuumizing channel, the vacuumizing interface and the vacuumizing channel for being connected to a vacuumizing device, so as to vacuumize the chamber; it further comprises an upper cover, a base and an upright post, wherein the upper cover is located above an uppermost plate-shaped pressing member, the base is located below a lowermost plate-shaped pressing member, and each plate-shaped pressing member is connected to the upright post in an up-and-down sliding manner through a sliding connection structure; the lift driving device drives the upper cover and the base to get close to each other to drive the plate-shaped pressing members to press against one another, so as to enable the pressing layers to be closed for pressing; an elastic member is arranged between adjacent plate-shaped pressing members, wherein the elastic member is an elastic sealing member, and when the adjacent plate-shaped pressing members press against each other, the elastic member completely or intermittently seals the chamber formed by the space between the adjacent plate-shaped pressing members; the laminator further comprising a closing positioning and supporting device, which supports each plate-shaped pressing member when the pressing layer is closed; wherein the closing positioning and supporting device of a plate-shaped pressing member located in the middle comprises a jacking block and a jacking oil cylinder or air cylinder, a cylinder body of the jacking oil cylinder or air cylinder is fixedly arranged on the base, the jacking block is respectively arranged in a position corresponding to the jacking oil cylinder or air cylinder, on each plate-shaped pressing member located in the middle, and when the pressing layers are closed, a cylinder rod of the jacking oil cylinder or air cylinder jacks the jacking block of the corresponding plate-shaped pressing member; and the closing positioning and supporting device of the uppermost plate-shaped pressing member comprises an oil cylinder or an air cylinder, a cylinder body of the oil cylinder or the air cylinder being fixedly arranged on the upper cover, and a cylinder rod of the oil cylinder or the air cylinder being fixedly connected to the uppermost plate-shaped pressing member.