By using the research data from 300 apple farmer households in 28 major villages of Luochuan County in Shaanxi Province,this paper adopts the statistical measure to analyze the inputoutput efficiency of farmer households and the influencing factors related.The research indicated that from 2007 to 2008,though apple farmer households’ overall input increased,there is a large decline in the average earth productivity,labor productivity and the fund using efficiency.The result has much to do with factors of apple planters’ home labor structure,the influence of natural disaster,the deficiency of fund for product investment,relative backward infrastructure conditions and so on.