High-temperature sapphire weighing sensor

The invention relates to a high-temperature sapphire weighing sensor which can maintain long-term stable work in a high-temperature environment. The high-temperature sapphire weighing sensor is provided with a shell with a cable connector; a niobium-based alloy elastic body with a strain zone surface and an external circuit bard which is connected with the connector are installed in the shell; the center of the strain zones at two side surfaces of the elastic body is provided with a sensitive assembly which is connected with the external circuit board; the sensitive assembly sequentially comprises a sapphire base, a strain resistance layer, a welding layer and a passivation protecting layer from inside to outside; and a high-temperature Ni resistor for compensating sensitivity drift caused by temperature change is welded on the external circuit board. The invention adopts advanced approaches, such as ion beam sputtering process, ion beam etching process, electrostatic sealing process, and the like, ensures that the sensor has excellent long-term stability in the high-temperature environment, has the advantages of tiny temperature zero drift and high comprehensive precision and can precisely measure carried weight.