The invention discloses a continuous weight meter and a continuous weight metering method thereof. The continuous weight meter comprises a sensor input terminal, a filter circuit, an amplifying circuit, a velocity measurement signal processing circuit, a micro controller unit (MCU), a display drive circuit, an optical coupler, a drive circuit and a keyboard circuit, wherein, the MCU is internally provided with a temperature measuring module and can be used for carrying out temperature compensation on the continuous weight meter according to the external temperature. Temperature compensation and anti-interference filtering treatment are carried out, sensitivity of the continuous weight meter to variation of the outside temperature is reduced, and the anti-interference capability of the continuous weight meter is improved, thus stability and reliability of the whole continuous weight meter are enhanced on the whole.