The utility model discloses an evaporation and concentration device for threonine filtration liquid comprising a feed pump (102), a preheating device (103), evaporating devices, condensed water buffering devices, separating devices, circulation pumps, a quadruple effect feed pump (7), a triple effect feed pump (9), a crystallization pot (10) and a crystallization pump (101). At least two groups of the evaporating devices, the condensed water buffering devices, the separating devices and the circulation pumps are arranged. The upper end opening and the lower end opening of each evaporating device are provided with the circulation pumps of the same group. The condensed water buffering devices are communicated with the lower end opening of the first group of the evaporating device through the feed pump (102) and the preheating device (103). The condensed water buffering device and the separating device are arranged to be communicated with the evaporating device of the same group. An output opening of the separating device of the former group is communicated with the upper end opening of the evaporating device of the latter group. The output opening device of the condensed water buffering device of the last group is arranged to be communicated with the lower end opening of the evaporating device of the next group. The output opening of the separating device of the last group is arranged to be communicated with the lower end opening of a triple effect evaporating device (31). The output opening of the condensed water buffering device of the last group is communicated with the lower end opening of the triple effect evaporating device (31). Accordingly, the evaporation and concentration device guarantees quality of threonine super-saturated solution and improves efficiency.