Based on previous theories and studies, we selected the prospective paradigm and creatively used the single-task program in this research. Experiments were conducted with geometric stimulus presented in visual mode, we aimed at exploring the effect of break position (waiting duration) , break duration, and the effect of expecting a break. At the same time, the relationship between duration production and the break position was further investigated. The results showed that the effect of break position (waiting duration) is significant. The cue factor nested in experimental conditions shows a significant effect. The effect of the break duration and the combined effect of the break duration and the break position are not discovered in this experiment. Two main conclusions are drawn from this study: (1) Attention is an important factor which influences subjects’ timing behavior. the break position may, at some extent, lengthen duration estimation. (2) Subjects' expecting of a break in duration estimation tasks influences their timing behavior. Subjects produce the shorter value of duration estimation in the cued conditions of trails without breaks than in the uncued conditions of trails without breaks.