The utility model relates to the technical field of recycling of steam condensate in a process of preparing caustic soda by using a Wudi ionic membrane, in particular to a steam condensate recycling device, which comprises a condensate collecting device and a condensate pump, and a condensate incoming pipeline is communicated with the condensate collecting device. The device is reasonable and compact in structure; convenient use, firstly, the problem that steam condensate water can only be conveyed to a synthesis furnace to generate byproduct steam for single purpose in the recycling process is solved; according to the utility model, the purpose of multiple purposes of the steam condensate for preparing caustic soda by using the Wudi ionic membrane is realized, the major hidden danger of damaging a synthetic furnace in the original process is solved, and the process defect that leakage cannot be monitored in the using process of a saline water heat exchanger in the original process isovercome. According to the utility model, the waste of condensed water heat can be reduced, the production and operation cost is reduced, and energy conservation, consumption reduction and cyclic utilization are truly realized.