Farmland　environment　is　away　from　power　facilities　and　its　information　collection　lasts　long　time.　These　characteristics　make　the　wireless　sensor　networks　in　agriculture　face　the　problem　of　energy　constraint.　Efficient　routing　and　sleeping　algorithm　can　save　energy.　Considering　the　node　residual　energy　and　the　collection　cycle　of　the　destination　nodes,　this　paper　improved　a　WSN　routing　and　sleeping　algorithm　based　on　the　AODV　routing　algorithm.　This　algorithm　establishes　routing　path　based　on　the　node　residual　energy　and　the　node　collection　cycle.　Node　sleeping　cycle　determined　after　the　routing　path　has　been　established.　By　routing　path　selection　and　appropriate　sleeping　cycle　this　algorithm　can　reduce　overall　energy　consumption　and　avoid　excessive　energy　consumption　of　some　individual　nodes.