In order to solve the problem of incomplete deinsectization caused by uneven heating of radio frequency,this paper studied the role of pore dispersion structure in improving the radio frequency heating rate and the heating uniformity and its application in insecticidal application from the aspects of pore direction,hollow solid,pore number,pore diameter and distribution mode.Taking rice as an example,it was found that the vertical dispersed structure was superior to the horizontal structure and the hollow structure was superior to the solid core in promoting the heating rate.With the same pore size,the more holes,the better the effect.With the same number of holes,the larger the diameter,the better the effect.The equidistant distribution has the highest heating rate,but the concentrated distribution of the cold area has the best heating uniformity.After using the 12-pore 22 mm dispersed structure for radio frequency deinsectization,the death rate of adult rice weevils in the samples increased from 16.8% in the control group to 100% after heating for 7 min.For the red flour beetle,the death rate increased from 8.7% in the control group to 98.1% after radio frequency heating for 10 min.