Abstract: when spraing Higher-fatty aecohoc-fatty acid on plant surtace ar ground ,it coued form a filrm layer no eye seen.In the internationae ,it have been on as restrain agent of evaporation and steeming which can raising the suruiuae rate of tran-aplat seedings ,increasing drought-reought-resistance and feeze-resis-tance,and acso the plant growing and output .We have found that applying this in many crops can xontroe plant desease and insect pests ,We found that can provide frips ,aphid and red spider etc .uhen spraing it on cotton may increase yield 10%~13%and using it after wheat flowering stage that can raise the 1000-kernel wt.2g and outpue ouer 10%.