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The invention discloses a method for removing soluble silicon dioxide in scheelite beneficiation wastewater. The method comprises the following steps: (1) adding lime into scheelite beneficiation wastewater to be treated, stirring, and carrying out coagulating sedimentation to obtain first supernate; (2) adding calcium chloride into the first supernate obtained in the step (1), stirring and dissolving, adjusting the supernate to be strongly alkaline, enabling the pH to be 11-13, stirring, standing and precipitating to obtain second supernate; and (3) adjusting the pH value of the second supernate in the step (2) to be neutral to obtain the treated water without soluble silicon dioxide. The method firstly adds the lime into the scheelite beneficiation wastewater to coagulate and settle most soluble silicon dioxide and suspended solids in the wastewater, then adds the calcium chloride into supernate water, and adjusts the pH value of the supernate water to further settle the residual soluble silicon dioxide and the difficult-to-settle fine suspended particles in the wastewater, so that the efficient removal of soluble silicon dioxide in the wastewater is realized.