Preparation method of concentrated diospyros Iotus linn clear juice

The invention discloses a preparation method of concentrated diospyros Iotus linn clear juice. The preparation method comprises the following steps of 1) cleaning raw material diospyros Iotus linn, and removing silt, weeds and the like on the surface; 2) extracting to obtain diospyros Iotus linn raw juice; 3) carrying out enzymolysis on the diospyros Iotus linn juice obtained by the extraction; 4)carrying out enzyme deactivation treatment on the diospyros Iotus linn juice and decolorizing by adopting activated carbon; 5) adding diatomite into the diospyros Iotus linn juice, and filtering; 6)concentrating the filtered diospyros Iotus linn juice to 40-65 Brix; and (7) sterilizing, filling and storing, specifically, sterilizing the concentrated diospyros Iotus linn juice by using a tube sterilization machine, and filling to obtain the finished product concentrated diospyros Iotus linn clear juice. The diospyros Iotus linn juice is treated through a compound enzymolysis method, the proportion of enzymes is optimi