Ventilation and blood flow data processing method and device and breathing machine

The invention provides a ventilation and blood flow data processing method and device and a breathing machine. The method comprises the steps that first impedance variable quantity data related to respiration and second impedance variable quantity data related to blood flow perfusion in multiple sub-areas of target tissue are obtained; according to the first impedance variable quantity data and the second impedance variable quantity data, the ventilation and blood perfusion equivalent ratio of the sub-regions is obtained; at least according to the first impedance variable quantity data, the second impedance variable quantity data and the ventilation and blood perfusion equivalent ratio of the multiple sub-regions, multiple of a normal region, a ventilation abnormal region, a blood flow abnormal region and a ventilation and blood flow abnormal region are divided from the multiple sub-regions; therefore, a schematic diagram corresponding to the plurality of sub-regions is displayed, a plurality of differentials