Particulate materials are often in the form of powderswhich are themselves agglomerations of much smaller primary particles.A common problem in the handling of powders is the degradationdue to attrition and/or fragmentation of agglomerates as theycollide with each other and with the process equipment. Impact breakage hasbeen studied experimentally for many years. However, information from thoseexperiments is normally restricted to post-impact examinations of thefragments and debris produced during the short duration of an impact event.Numerical simulations of agglomerate impact fracture, especially usingdiscrete element method, have achieved great successes over the pastdecade. New theories based on modern contact mechanics and new concepts havebeen proposed to study the mechanism of agglomerate impact breakage. Thispaper gives a brief review on the current development of the research,and also describes the simulation techniques of agglomerate impact.