The invention provides a power factor electric charge adjustment method based on user electricity fitting and belongs to the field of electric power systems. The method comprises the steps that user power factors are acquired, an expression of an adjustment coefficient xi is determined according to a comparison result of the user power factors and a power factor standard value, a power factor electric charge is adjusted based on the expression of the adjustment coefficient xi, and an electric charge expression obtained after adjustment is acquired. On the basis of an existing power factor adjustment electric charge table, a segmented fitting mode is adopted to determine the electric charge adjustment coefficient, then the electric charge is adjusted, finally the expression of the power factor electric charge after correction is obtained, therefore, an overall reactive proportion of a user can be represented, and the precision of electric charge computing is improved.