Treatment system suitable for small-scale distributed rural domestic sewage

The invention discloses a treatment system suitable for small-scale distributed rural domestic sewage. The treatment system comprises an anaerobic baffle plate reactor, a falling dry type constructed wetland and a subsurface flow constructed wetland. The anaerobic baffle plate reactor comprises a black water inlet pipe, a reactor top plate, a biofilm carrier filler, a submersible lift pump, a reactor tank body, a baffle plate, a water distribution partition wall, a grey water inlet pipe, a reactor bottom plate and a water outlet pipe. The reactor top plate is fixedly connected to the top surface of the reactor tank body; the water distribution partition wall is fixedly connected in the reactor tank body and divides the reactor tank body into an anaerobic main reaction zone and a mixed sewage adjusting zone; the biofilm carrier filler and the baffle plate are positioned in the anaerobic main reaction zone; and the baffle plate is connected with the reactor tank body to form an S-shaped flow channel, a water in