The invention discloses a multi-vane anisotropic turbulent flow type low-pressure and self-balancing slurry degassing device. According to the multi-vane anisotropic turbulent flow type low-pressure and self-balancing slurry degassing device, a main body is composed of a multi-vane anisotropic turbulent flow generator and a low-pressure double-balance automatic accommodometer. The multi-vane anisotropic turbulent flow generator is provided with an agitating shaft, four sets of anisotropic vanes, an agitating barrel, a gas inlet guide pipe and a gas outlet guide pipe; the low-pressure double-balance automatic accommodometer is provided with a double-sleeve three-way closed glass outer pipe, a two-way glass inner pipe and a differential pressure balancing adjusting medium. According to the multi-vane anisotropic turbulent flow type low-pressure and self-balancing slurry degassing device, due to the design of non-equal-length backward vanes and a double-sleeve three-way gas quantity self-balancing compensation device, low-quantity gas carried by slurry can be agitated sufficiently and degassed; under the condition of ultralow gas quantity, the double-sleeve three-way gas quantity self-balancing compensation device can effectively carry away trace gas in the slurry. Therefore, the multi-vane anisotropic turbulent flow type low-pressure and self-balancing slurry degassing device is suitable for degassing the conventional slurry, is particularly suitable for degassing the slurry with great slurry density, many organic additives, great viscosity and small gas content, is complete in structure, is strong in adaptability and has a very good degassing effect.