The invention provides an organic salt for oil gas exploitation and a preparation method and application thereof. The organic salt for the oil gas exploitation is prepared from the following components of 20 to 60 parts of sodium silicate, 3 to 15 parts of calcium hydroxide, 5 to 30 parts of potassium hydroxide, 5 to 30 parts of glucose, 3 to 25 parts of starch, 30 to 150 parts of carbon monoxide, and 200 to 400 parts of water. The organic salt for the oil gas exploitation provided by the invention has the advantages that the inhibiting property on shale is realized, the organic salt can be prepared into adjustable drilling liquid with density lower than 1.63g/cm<3>, and the certain viscosity is realized, the funnel viscosity is lower than 65s, the drilling cuttings are conveniently carried, and a borehole is kept clean; the good function of maintaining well wall stabilizing is realized for the fracture type developed or crushed coal reservoir, the permeation damage rate to the coal reservoir is lower than 20%, and the permeation damage rate to the conventional sandy rock is lower than 15%; the inhibiting property of drilling liquid and completion fluid on various reservoirs is improved, the purpose of protecting the reservoir is realized, and the environment-friendly effect is realized.