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No dynamic soil-plant leachate treatment system is composed of physical sedimentation tank, anaerobic fermentation tank and soil-plant system pools together constitute the three pools of the sewage treatment system.Systems are low cost, ease of operation and maintenance less time-consuming, etc.Therefore suitable as a process of decentralized rural South technical measures for sewage discharge.In this paper, the study of sand-soil-plant system, through testing and laboratory analysis determined the method of combining the three outdoor pools.Conditions of the winter season, the preparation of the three sewage effluent hydraulic loading system results, Indicators measuring pH, total nitrogen, total phosphorus, chemical oxygen demand, ammonium nitrogen, and combining with pot experiment research methods, research different nitrogen and phosphorus level on calamus, windmill grass, canna three plants absorb nitrogen and phosphorus, to improve the soil-plant system leakage sewage purification efficiency, building beautiful villages to provide scientific basis.The main conclusion is as follows:(1) The results of pot experiment of different nitrogen and phosphorus absorption of nitrogen and phosphorus effects on3kinds of plants showed that, in different nitrogen and phosphorus quantity feeding level (N10mg·L-1,N60mg·L-1, P1mg·L-1, P6mg·L-1), compared with the control treatment, most of the plant height and biomass quality compared with control,3kinds of plant the whole plant and the shoot dry weight yield by Canna> calamus> windmill grass, but the variation coefficient of variation is just the opposite.(2) Compared with the control, all parts of the plant (pot experiment with aerial and underground part) increased TN and TP content with N, P levels in sewage and generally improve, are great differences exist among different plants and different plant parts. The part of the plant for N and P absorption rate is also different, generally low N and low P levels, the part of the plant on N and P uptake rate was higher than that of high N and high P treatment;3species of both N, P level, plant the whole plant of N and P uptake rates were the highest Canna (high N, P and low N, P ceiling yield respectively in37%,56%and95%, 154%), the other2kinds of plants at high N level is the windmill grass than Acorus calamus, high level of P windmill grass and calamus; and low levels of N, P is greater than the windmill grass calamus the part of the plant; N and P absorption rate, Canna in stem and leaf of accumulation, root rarely, Cyperus angustifoliate centered, and Calamus mainly accumulated in root.(3) In the winter and spring soil-canna leakage system test conditions, three hydraulic loading (0.04m3/m2.d,0.06m3/m2.d,0.1m3/m2.d) environment, the pH of the sewage COD, TN, TP and NH4+-N removal capacity. The results showed that the addition to the pH value, the indicators removal efficiency generally decreased with the hydraulic loading increases the discharge water which can reach the emissions level B in (COD60mg·L-1, TN15mg·L-1, NH4+-N15mg·L-1, TP0.5mg·L-1) standard.(4) Each indicator in winter-spring season test time, removal rate of40%-98%, P removal rate is the highest, up to93%-98%, followed by COD,62%-78%, TN and NH4+-N (TN49%～66%,NH4+-N40%～68%); seasonal influence on TN, COD and pH values are higher in spring than in winter, pH value kept in between7-9, TP and NH4+-N are not obvious.
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