Aiming at the serious problem of nitrate nitrogen leaching in facility agriculture,the main causes of nitrate nitrogen leaching were studied,among which the amount of fertilizer,irrigation method and cultivation mode were the main factors affecting nitrate nitrogen leaching.In addition,the effective measures to reduce nitrate leaching are summarized,including optimizing fertilization,rational irrigation,rational cultivation,etc.These measures can save resources and reduce the impact of nitrogen leaching on ecological environment.