A front power output electro-hydraulic control valve of a tractor comprises a filter assembly, a gear pump assembly and a control valve body assembly. The gear pump assembly is connected to the control valve body assembly in a screwed manner, and then the filter assembly, the gear assembly and the control valve body assembly are connected together in a screwed manner through long bolts. The filter assembly comprises a filter shell, a filter screen, a filter gland and a check ring. The filter screen is inserted in the filter shell, the filter gland is then pressed on the filter screen, and then the check ring and an O-shaped seal ring are arranged. The gear pump assembly comprises a pump body, a power gear, a pump driving gear, a pump driven gear and a bush. The bush is assembled on the pump body. The power gear and the pump driving gear are coaxially fastened and assembled. The pump driving gear and the pump driven gear are constantly engaged and assembled on the pump body and a control valve body. The control valve body assembly comprises an electromagnetic valve assembly, a safety valve assembly and the control valve body. The electromagnetic valve assembly is connected in an installation hole of the electromagnetic valve assembly of the control valve body in a screwed manner, and then the safety valve assembly is arranged in an installation hole of the safety valve assembly of the control valve body.