The utility model relates to a mobile change car used for changing battery boxes for electric vehicles. The mobile change car used for changing battery boxes for electric vehicles comprises a chassis. A carriage is arranged on the chassis. A support for supporting battery boxes is arranged in the carriage. The front end of the support is provided with an access and bearing rollers, the access is used for insertion or pullout of a battery box, and the bearing rollers are used to be in rolling fit with the battery box when the battery box is inserted in or pulled out of the support. The carriage is provided with doors corresponding to the access of the support. The corresponding battery box on the support can be pulled to a corresponding mobile change car only by opening the doors, and the whole process requires no manual carrying of the battery boxes. Resistance in the pullout process of the battery boxes is small under the action of the bearing rollers, and accordingly intensity of labor in battery change is reduced greatly, and the problem of high labor intensity in mobile battery change for the electric vehicles is solved.