To investigate the present situation of mechanical grain harvest and to select appropriate mechanical harvest grain hybrids in eastern of Liaoning, field experiment was conduct in 2016-2019, 45 hybrids were planted with the block size of 1 000-1 500 m². Grain yield, kernel moisture content, yield loss rate, grain breakage rate, impurity rate was test to evaluate mechanical harvest quality in eastern of Liaoning. Maize yield was unstable in this region and varied in different years. Kernel moisture content at maturity stage range from 29.2% to 30.9%. Kernel moisture content was at 18.5%～24.5% when harvest in later October. Kernel brokage rate was 5.25% in 2018, and less than 5% in other years. Yield loss rate was less than 5% and impurity rate was less than 1% during 2016 to 2019. Kernel moisture content was positive relative with kernel grain breakage rate and negative relative with yield loss rate.When the kernel moisture content was at the range of 21.4%～25.5%, grain breakage rate and yield loss rate were both lower than 5%, which meet national standards. Hybrids ZhengDan958, Tieyan 58, Tieyan 388, Hongshuo 899,Liaodan 522, Lishou 1, Dongdan1331, Danyu 631, Danyu 530 with high yield and low kernel moisture content in harvest, were suggested as appropriate mechanical harvest grain hybrids. Low and unstable grain yield, high grain breakage rate were the main limiting factors for maize mechanical grain harvest in eastern of Liaoning. Delaying harvest was benefit to realize mechanical grain harvest.