Acidic soil conditioner and preparation method thereof

The invention discloses an acidic soil conditioner and a preparation method thereof. The acidic soil conditioner is prepared from fermented biogas slurry, potassium dihydrogen phosphate and potassium carbonate according to a certain proportion, and comprises the following steps: A) weighing completely fermented biogas slurry: weighing 1L of the completely fermented biogas slurry by using a measuring cylinder, placing into a 2L clean glass beaker, and weighing the using amount of the acidic soil conditioner; B) weighing medicaments according to a volume-mass ratio: respectively weighing potassium dihydrogen phosphate and potassium carbonate by using a 1% balance according to the volume-mass ratio of 1L/5g/10g; D) dissolving the medicaments: sequentially adding potassium dihydrogen phosphate and potassium carbonate into the 1L completely fermented biogas slurry according to an order, and stirring while adding till complete dissolution to obtain the conditioner, wherein potassium carbonate is further added after