As a kind of new rocket propellant, gelled propellant is thought to integrate the advantages of traditional liquid propellant and solid propellant. Gelled propellant′s special non-Newtonian rheological characteristics make it difficult to be atomized and atomization is one of the key problems of gel propulsion technology. Jet impingement atomization was the mainly used atomization method. The statuses of research on experiment, theory and simulation of gelled propellant jet impingement atomization were reviewed. From the discussion, the following conclusions could be drawn: firstly, in aspect of atomization experiment, with the analysis of experiment obtained atomization data, the influences of rheology and impinging parameters on atomization could be got, but hardly any quantitative result could be concluded. Secondly, in aspect of atomization theory, the liquid sheet characteristics, such as liquid sheet shape, liquid sheet breakup length, etc., could be predicted by the stationary antisymmetric wave theory and the linear stable theory, but the accuracy of the prediction was not so high and the atomization theory should be further improved. Thirdly, in aspect of atomization simulation, the main developing processes of jet impinging atomization could be simulated with both traditional mesh based methods and newly developed mesh free methods, but the simulation results was fairly rough and the atomization simulation was still on in a fledging period. In a word, the mechanism of the gelled propellant atomization was still beyond being fully understood, future work could be carried in the following aspects: to develop a quantitative gelled propellant atomization characterizing method, to develop a new non-Newtonian rheological based and impingement included atomization theory, to improve the numerical simulation methods according to the characteristics of jet impingement atomization of gelled propellant, etc.