Harmless treatment method of drilling mud produced by in-situ leaching uranium exploration

The invention relates to a harmless treatment method of drilling mud produced by in-situ leaching uranium exploration. According to the method, radioactivity monitoring is carried out in a mud drilling process. The harmless treatment method comprises the steps of pumping non-ore-bearing strata mud into a mud pit by using a mud pump, and adding a flocculating agent into the mud pit at the same time; carrying out solid-liquid layering on the mud, and then gradually discharging supernatant liquor into a sewage purifying pond; adding a purifying agent into the sewage purifying pond for carrying out purification treatment. The harmless treatment method also can be implemented by the following steps: dividing ore-bearing strata mud into coarse sand mud and fine sand mud by means of filtering pretreatment; removing the sand of the coarse sand mud by a vibration desander, and then dividing the mud without the sand into solid phase mud and liquid phase mud; adding the flocculating agent into the fine sand mud for carr