The permeability of water injection layer in some oilfield is 10~50×10-3μm2，which belongs to low permeability layer.The quality of water injection is highly demanded，ODP recommends that oil content of injected water be less than 8.0 mg/L and the median particle size of suspended solids less than 2 micron.The water quality treated by traditional methods cannot meet the requirements of water injection，such as hydrocyclone，plate coalescer，air flotation，fiber ball fine filter，modified fiber ball filter and ultrasonic fine filter etc.In order to verify the feasibility of using walnut shell and ceramic membrane double-stage filtration as the advanced treatment device of production water after the treatment of production water by hydrocyclone and compact air flotation device，field tests were carried out.The experimental results show that the average oil content of the produced water is reduced from 31.18mg/L to 3.6mg/Land the median particle size is reduced from 4.40μm to 1.42μm after deep treatment,which meets the requirements of ODP recommendation and related specifications.Field test has laid a solid foundation for the equipment acquisition in the oilfield in the next step，and also provided reference for similar oilfields.