Abstract: Corn is the main cultivation crop in Linhe. With the increased of planting area, high selectivity herbicide wascontinuously developed and producted, the application of chemical herbicide developed rapidly. But the chemical herbicideapplication need highly professional technology, weed control effect is influenced by a number of factors, there was many problemsoccurred such as weed control effect and phytotoxicity happend frequently. Stand on the local production practice,according to theproblems and causes of the corn field chemical herbicide application,we put torward eftective method to solve problems.