The variation in the equivalent resistance and temperature volues of measured medium ice and water,which were involved in the detection field emvirenment of ice conditions,was investigated in the temperature range of room temperature to-30℃.Furthermore,the characteristics of the large difference in the equivalent resistance and temperature between ice and water was used to design the dotection sensor of ice conditions.On-site continuous observation test was conducted on ice conditions in wanjiazhai reservoir.The analysis of the collected data shows that the novel method and equipment for ice condition detection could accurately achieve real-time and all-process monitoring of ice thickness in reservoir.