Chinese medicinal herb preparation for lead removing treatment and preparation method thereof

The invention discloses a Chinese medicinal herb preparation for a lead removing treatment and a preparation method thereof. The Chinese medicinal herb preparation contains the following medicinal materials as raw materials: 180-220 g of mung bean, 144-176 g of semen euryales and 36-44 g of dark plum. The preparation method comprises the following steps of: 1) taking the mung bean and grinding the mung bean to fine powder; soaking the powder with water and stirring the solution; filtering the solution to obtain mung bean dregs; filtering filtrate; and freezing and drying filter residue, to obtain mung bean protein powder; 2) adding water into the mung bean dregs; decocting, filtering and concentrating the solution to obtain concentrated liquid; taking an upper polyamide chromatographic column of the concentrated liquid; eluting mung bean flavone, and filtering to obtain a mung bean flavone solution; 3) taking the semen euryales and the dark plum; adding water into the semen euryales and the dark plum, respect