Recently, the evaluation of sexually abused children or victims of sex crime has been an issue with reinforcement of institution and interest on sexually abused children. As results of clinical or court evaluation have been rejected for lack of evidence, however, there is a pressing need of initial interview tool that can help children make statements. This study will examine whether the sandtray can be used as initial interview tool for sexually abused children and present the diagnosis model and suggestions for improvement of sandtray as an evaluation tool. With regard to study target and method, I carried out initial interview through sandtray on 39 schoolchildren sexually abused and analyzed the features shown in sandtray through formal dimensions such as figure, space layout, configuration form and decoration attitude. As a result, the features based on diagnostic function of sandtray were positively identified through symptoms at sandtray of sexually abused children showing clear difference in terms of quantitative frequency. Further, suggestions for improvement were proposed to reinforce the diagnostic function of sandtray and to structure it as diagnosis tool. This study is the basic study to develop the initial interview evaluation tool for sexually abused children and is the in-process exploration study. In this regard, further studies are required as suggested to establish the tool instruction and to verify the validity of diagnostic tool through structuring of sandtray proposed in this study.