High-precision flow measurement method and device based on Hall element

The invention discloses a high-precision flow measurement method and device based on a Hall element, and relates to the technical field of flow measurement. The central control unit performs signal judgment according to the initial voltage signal and the first voltage signal; if the signal judgment result is that the voltage is continuously abnormal, enabling a detection unit to start a correction Hall element set in a Hall element array to detect the magnetic field of the current environment to obtain a target voltage signal set, and controlling a calculation unit to obtain a target correction value according to the target voltage signal set and a standard voltage signal set; the central control unit obtains the magnetic field of the current environment detected by the main measurement Hall element in real time to obtain a second voltage signal, the second voltage signal is corrected through a target correction value and then converted into a pulse signal, flow calculation is carried out to obtain final flow