Multi-stage electric heat pump-fused salt cascade heat storage and steam supply device

The utility model relates to a multi-stage electric heat pump-fused salt cascade heat storage and steam supply device which comprises a thermal power generating unit, a fused salt heat storage and release device and a multi-stage electric heat pump. The thermal power generating unit is connected with the fused salt heat storage and release device; the fused salt heat storage and release device is connected with a multi-stage electric heat pump through a pipeline pump; the multi-stage electric heat pump comprises a heat exchanger, a first-stage heating mechanism, a second-stage heating mechanism and a third-stage heating mechanism; the fused salt heat storage and release device comprises a fused salt heat storage device and a fused salt heat release device; the fused salt heat storage device is communicated with the fused salt heat release device; the thermal power generating unit comprises a boiler, a steam turbine high-pressure cylinder, a steam turbine intermediate-pressure cylinder and a steam turbine low-