The invention belongs to the technical field of heat exchange, and particularly relates to a modular plate type condenser. The modular plate type condenser mainly comprises a steam condensing module, a non-condensable gas cooling module and a condenser shell. The steam condensing module and the non-condensable gas cooling module mainly comprise sheets, sheet connectors, head boxes and tail boxes. The sheets are assembled together through welding, so that staggered steam and cooling water flowing channels are formed. The two ends of a circulating water flowing channel are connected with the sheet connectors through welding, the sheet connectors, the head boxes and the tail boxes are assembled through bolts to form the steam condensing module and the non-condensable gas cooling module, and the steam condensing module and the non-condensable gas cooling module are inserted into insertion grooves of the condenser shell and connected with the shell through bolts. The modular plate type condenser is high in heat transfer coefficient, low in pressure drop resistance, compact in structure and high in space utilization, and due to the modular design, cleaning, maintenance and replacement of the sheets can be more convenient and rapider.