Washing and drying all-in-one machine

The invention relates to the related technical field of washing and drying all-in-one machine, and specifically discloses a washing and drying all-in-one machine. The washing and drying all-in-one machine comprises an outer barrel, an inner barrel, a condenser, and a water inlet device and a drainage device respectively communicated with a water inlet and a drainage port of the outer barrel. The condenser is provided with a wet hot air inlet communicated with the outer barrel. One end of the condenser is communicated with the water inlet device, and the other end is communicated with the drainage device through a condensate water discharge pipe. A drainage end is arranged on the condenser, and the drainage end is communicated with a drainage filter of the drainage device through the condensate water discharge pipe. In a clothes drying process, liquid water formed by vapor in wet hot air contacting the condensate water would not flow back to a holding space, and the liquid water and condensate water are directly discharged through the drainage filter of the drainage device and the condensate water discharge pipe, so as to reduce heat used for drying from being absorbed since the condensate water flows into the holding space, and improve drying efficiency.