The invention discloses a controllable underground water level burial depth crop moisture sensitivity index calculation method. The method comprises the following steps: (1) obtaining actual measurement data information of crop annual output and daily diving evaporation capacity of at least four years of different underground water levels; (2) dividing growth periods of crops, and ensuring that the number of the divided growth periods of the crops is consistent with the number of years selected from actual measurement data; (3) finding out the maximum value of the crop yield and the maximum value of the accumulated amount of diving evaporation in each growth period from the actually measured data; (4) importing the related data obtained in the step (2) and the step (3) into a calculation model to calculate moisture sensitivity indexes of the crops with different underground water levels and buried depths in each growth period. According to the influence of shallow groundwater burial depths of different layers on crop root system soil moisture supplementation, the content of the crop and water relation field is supplemented, the diving evaporation data and the moisture sensitivity index are associated, and the moisture utilization degree of crops is quantitatively reflected.