The invention discloses a dual-valve-element brake valve. The dual-valve-element brake valve comprises a valve body, a left valve element, a left compressing spring, a right valve element, a right compressing spring, an end cap and a mandrel; the valve body comprises a left valve hole, a right valve hole, an end cap hole, a pushing plate hole, an oil inlet, an oil return hole, an oil return passage, a control oil port, a screw hole and a hinge hole, the left valve element is mounted in the left valve hole in the valve body and can move in the axial direction of the valve body, the left compressing spring is mounted in the left valve hole in the valve body and makes contact with the lower end of the left valve element, the right valve element is mounted in the right valve hole in the valve body and can move in the axial direction of the valve body, the right compressing spring is mounted in the right valve hole in the valve body and makes contact with the lower end of the right valve element, the end cap is mounted in the end cap hole at the upper end of the valve body and is flush with the upper end of the end cap hole, and the mandrel is mounted in a through hole in the middle of the end cap and can move up and down along the through hole. According to the technical scheme, simultaneous braking of front and rear wheels of a construction machine can be realized.