Instant thickening agent system

The invention discloses an instant thickening agent system and relates to an assistant for petroleum exploitation. A preparation method of the instant thickening agent system comprises preparing 30 to 40 parts by weight of diesel oil, 3 to 8 parts by weight of a dispersant and 35 to 45 parts by weight of an instant thickening agent into an oil-based instant thickening agent, and mixing 1 to 1.5wt% of the oil-based instant thickening agent, 1 to 3wt% of KCl, 0.1 to 0.3wt% of a discharge aiding agent CAM-15, 0.08 to 0.12wt% of an antiswelling agent CAM-17, 0.02 to 0.05wt% of a bactericide SX-21, 0.1 to 0.3wt% of a temperature stabilizer SX-29 and 90 to 97.7wt% of water into the instant thickening agent system. The instant thickening agent system is suitable for a continuous blending process of a large-scale oil well, has a fast dissolution rate, is convenient for on-site preparation, replaces the existing liquid-blending station for a liquid blending process, solves the problem of inconvenience of tank car tran