The invention discloses a concentration device for production of simvastatin. The device includes a concentration tank, the outer wall at the bottom of the concentration tank is sleeved with a heating jacket, one side top of the concentration tank is connected to a feed pipe through a flange, one side bottom of the concentration tank is connected to an electronic liquid level meter by a flange, one side of the inner wall at the bottom of the concentration tank is connected to an electronic thermometer through a bolt, the bottom of the concentration tank is connected to a concentrated liquid electromagnetic valve through a flange, the outlet of the concentrated liquid electromagnetic valve is connected to a concentrated liquid transfer pump through a pipeline, and the top of the concentration tank is connected to a gas-liquid separator through a pipeline. According to the invention, both the concentration tank and the heating jacket are coated with a thermal insulation layer, at the same time the mixed liquid returned by a liquid return pump is heated by a heater, and then enters the concentration tank, so that the concentration device provided by the invention has reduced energy consumption, at the same time residual contamination phenomenon can be avoided in the concentration process of simvastatin, and the interests of enterprises can be improved.