The spiral extrusion solid-liquid separator is one processor that gets solid and liquid organic fertilixer from the liquid organism(such as wood,grass,dustand animal wastes,etc.)by spiral extrusion and solid dissociation. The dissociated solid has low moisture content and is easy to be transported to field or distant regions short of fertilixer.It can be used as organic complex fertilizer to improve soil environment,excellent fertilixer for planting and good feed for breeding chicken,duck and fish.the dissocated liquid can be introduced into methane tank to be converted to fuel energy through anaerobic treatment,At the same time,the problem of short service life methane tank caused by dolid residue clogging can be resolved.