High-density fracturing fluid and preparation device

The invention relates to a high-density fracturing fluid and a preparation device. The fracturing fluid is prepared from the following components in parts by weight: 20 to 90 parts by weight of an organic salt weighting agent, 0.1 to 2.0 parts by weight of a thickening agent, 0.2 to 2.0 parts by weight of a cross-linking agent, 0.1 to 1.5 parts by weight of a temperature stabilizer, 0.1 to 0.8 part by weight of a delayed cross-linking agent, 0.3 to 0.9 part by weight of a regulator, 0.1 to 0.4 part by weight of a bactericide, 0.2 to 1.2 parts by weight of an active agent, 0.1 to 0.3 part by weight of a cosolvent, 0.1 to 0.6 part by weight of a gel breaker, 0.3 to 0.9 part by weight of an anticoagulant, and 60-90 parts by weight of water. According to the fracturing fluid disclosed by the invention, a high-pressure well and a deep well can be effectively fractured, so that the oil and gas productivity is improved, and the fracturing construction pumping pressure can also be reduced; meanwhile, the delayed cros