The invention provides a liquid analyzing device which comprises a loading platform, a driving unit, a turntable and a steering mechanism, wherein the driving unit is used for driving the loading platform to rotate; the turntable is rotatably arranged on the loading platform and is used for loading an analyzing blocking gate; the steering mechanism is connected between the loading platform and the turntable. When the loading platform is driven to rotate by the driving unit and the rotating speed of the loading platform is changed and exceeds a preset rotating speed, the turntable is rotated relative to the loading platform. The liquid analyzing device provided by the invention can automatically switch the direction of the turntable, so that the operation efficiency can be effectively increased.