The utility model discloses an environment -friendly sewage treatment device, including handling case and inlet tube, handle case upper portion and install fixed pipe, install the filter screen on thefixed pipe, the internally mounted who handles the case has the purifying box, and the leak -off chute is installed to the top of purifying box, and the chemical agent case is installed to the bottomof leak -off chute, and leak -off chute, chemical agent case all communicate with the purifying box. This environment -friendly sewage treatment device, compact structure, the filter screen is convenient for clear up by convenient operation.