The invention relates to a sewage treatment method and a sewage treatment device. The toilet sewage treatment method comprises the following steps: firstly conducting solid liquid separation on the sewage discharged from a toilet, then disinfecting, filtering for the second time, and discharging or reusing the sewage reaching the emission standard after further in-depth treatment. The toilet sewage treatment device comprises a sewage tank which is internally provided with a solid liquid separation chamber and a solid storage chamber, a solid liquid separating and filtering tank is installed in the solid liquid separation chamber, a sewage inlet and a solid matter outlet are arranged on the solid liquid separating and filtering tank, and the solid liquid separation chamber is provided with a sewage outlet connection filter pipe. The toilet sewage treatment device and the toilet sewage treatment method disinfect the sewage from the source, the spreading basis of virus and microbes in the sewage is cut off, and the sewage is purified and treated in depth at the same time, so that zero emission of the sewage and resource regeneration and recycle are implemented in a community, and the problem of new pollution of sludge and sediment in a traditional treatment method is avoided effectively.