Abstract: Ground water evaporation is an important process in water cycling. The bromide tracer is an effective tool to indicate the unsaturated zone flow process. It is of great significance to analyze the transport process of bromide under continuous evaporation condition and to estimate the effects of tracer injection conditions on estimating groundwater evaporation, and then to prove the applicability of bromide tracer for evaluating groundwater evaporation. In this study, HYDRUS software is used to build multiple sets of one-dimensional unsaturated water-solute transport models. Simulations were run to analyze the bromide transport under different conditions of water table depth and lithology, and to estimate the impact of tracer injection depth and concentration on evaluation of groundwater evaporation. The results show that: the bromide concentration peak moved upward fast due to the high intensity of groundwater evaporation when the vadose zone is thick and consisted of fine sediment. The different response of bromide transport to different conditions of vadose zone indicated the potential of bromide tracer to evaluate groundwater evaporation. The injection depth and concentration of tracer are important human factors affecting the evaluation results. The quantity of groundwater evaporation calculated by bromide tracer method was closer to the actual quantity when the injection depth is shallower. The injection concentration of tracer determines its peak concentration observed in the soil profile during the experiment period. The dispersion effect gradually enlarges the distribution range of tracer, thus the distribution of bromide concentration tends to be uniform in the profile and it is difficult to ascertain the position of bromide concentration peak. High injection concentration is conductive to prolong the evaluation period. Rainfall and the fluctuation of soil water content are potential negative factors affecting the evaluation results of field tracer test.