Steel fiber concrete high overall container used for disposal of radioactive substance and its preparation method

The invention discloses a steel fiber concrete high overall container used for disposal of radioactive substance and its preparation method. The steel fiber concrete high overall container comprises a main body and a cover poured by concrete doping with a water reducer and steel fiber, the concrete is composed of a gel material, aggregate and water, by metering the concentration of concrete according to 2400kg/m , a gelling material in each cubic meter of concrete is 550-600kg; the gelling material comprises the following raw materials by mass percentage: 46-76% of cement, 2.7-7.7% of silicon ash, 22-39% of slag and 2.7-7.7% of fly ash; the mass ratio of water to the gelling material is 0.23-0.28: 1; the aggregate is composed of sand and cobblestone, the sand rate is 33-38%; the doping amount of the water reducer accounts for 1.5-2.5% of total mass of the gelling material; and the doping amount of steel fiber accounts for 0.5-1.6% of total volume of the concrete. The steel fiber concrete high overall containe