The invention discloses an EV-charging-controllability considered unit combination model and a modeling method. According to the EV-charging-controllability considered unit combination model and the modeling method, the output of a unit and total loads of an EV integrated controller serve as control objects, the EV integrated controller serves as an interaction platform of a power grid dispatching center and EVs, the dispatching center issues a charging command to the EV integrated controller, and the EV integrated controller controls the EVs in an administration region of the EV integrated controller after receiving the charging command to meet the command; constraints such as user charging requirement constraints, dispatching capacity range constraints and unit-side constraints are comprehensively considered, the minimum sum of the running cost of the unit and the dispatching cost of the EVs serves as an objective function, and the EV-charging-controllability considered unit combination model is built; the dispatching cost of the EVs is considered in the objective function of the model, the user charging requirement constraints are considered in the constraint conditions, the requirement of users for the electric quantity of the EVs serves as one condition which must be met when the dispatching center controls the EVs to be charged, and the vehicle attributes of the EVs are sufficiently considered.