The utility model provides a developing waste liquid low-temperature distillation treatment all-in-one machine which comprises a machine body, and further comprises a low-temperature distillation barrel, a cooling barrel, a heat pump system and a vacuumizing device which are arranged in the machine body, and the vacuumizing device is used for controlling the vacuum of the low-temperature distillation barrel. A feeding hole is formed in the top of the low-temperature distillation barrel, a vacuum pipe is arranged at the bottom of the low-temperature distillation barrel, and the low-temperaturedistillation barrel is communicated with the vacuumizing device through the vacuum pipe. A steam pipe is further arranged in the low-temperature distillation barrel and located on the upper portion ofthe low-temperature distillation barrel, an inlet end is arranged at the position, corresponding to the steam pipe, of the cooling barrel, and the inlet end is communicated with the steam pipe. The heat pump system comprises a condenser, an evaporator and a compressor, and the condenser, the evaporator and the compressor are connected in series through pipelines to form a closed circulation system. According to the utility model, the energy consumption and the generation of plate flushing water can be effectively reduced, the production cost is reduced, the energy is saved, the environment isprotected, the treated water can be recycled for many times, and the device is suitable for large-scale popularization and application.