The present invention relates to a kind of portable power-saving and foldable electric wheel chair, characterized in that there is a hand control direction device on the left elbow 10 to control the specific running direction of the electric wheel chair; the left and right rear wheels 3 are integrated with the motors 30 respectively, so as the two motors 30 can directly drive the two rear wheels; two disc brakes 20 are installed on the left and right rear wheels 3, the two disc brakes are connected to the brake handle 15 via the main steel string 24, by means of a single hand press brake handle 15, the two rear wheels 3 braked simultaneously; switches 18 for positive or inversion running control the main running direction of electric wheel chair; an intellectual control rod may also be installed on the right elbow 12 to replace the speed-adjusting turning handle 14 and switches 18 for positive or inversion running. It is also characterized mainly in that: the worm-gearing indirect driving and electric magnetic brakes used by normal electric wheel chairs are not used by the present invention, so significant power-saving is achieved; and there is a cross foldable device 1.41-1.48 in the vehicle frame 1. Compared with the normal electric wheel chair, the advantages of the invention are: the self-weight is only half of the formers, the power consumption is only less than half of the formers, the traveling distance is twice of the formers, the comparable price (all are using lead-acid battery) is as low as a quarter of the formers, and foldable than the formers (with batteries).