Stepped solar heat storage heating device and using method thereof

The invention discloses a step-shaped solar heat storage heating device which comprises a heat preservation and insulation box, a reflux valve, an oil pipe, an oil pump, a tee joint, a vacuum heat collection pipe, a support, a groove type paraboloid condensation reflector and a sleeve type heat storage pipe, and the top end and the bottom end of the heat preservation and insulation box are provided with an air outlet channel pipe and an air inlet channel pipe correspondingly. The air outlet channel pipe and the air inlet channel pipe are both communicated with the interior of the heat preservation and insulation box, a temperature sensor and a warm air supply fan are installed at the end of the air outlet channel pipe, a groove type solar heat collector is adopted as a heat collector of the solar heat storage and supply device, solar energy can be gathered, and the defect that solar energy is low in density is overcome; the heat-conducting medium used by the device is heat-conducting oil, so that the phenomen