The utility model discloses a disposable ration of simulating rural septic tank drainage goes out water structure, wherein: including autosampler, autosampler upper portion is connected with the inlet tube, installs the peristaltic pump on the inlet tube, and the electric switch is controlled to peristaltic pump connection, and the peristaltic pump operating frequency can be controlled to the accuse electric switch, and the peristaltic pump includes the frame, is provided with the rotor in the frame, installs the several compression roller on the rotor, still be provided with the pump line chamber in the frame, the inlet tube passes from the pump line chamber, and the compression roller can rotate under the drive of rotor and oppress the inlet tube to the pump line chamber in to extrudeing the liquid in the inlet tube forward, being provided with the siphon among the autosampler, the siphon is for falling " U " type pipe, and autosampler's inner chamber is arranged in to the one end of " U " type pipe, and the other end is worn out bottom autosampler. The utility model discloses the rural septic tank effluent of ability altitude simulation, the disposable ration play water of the rural septic tank drainage automatic of realization.