The invention relates to a feeding device for dairy cows, in particular to an automatic feeding device for dairy cows in animal husbandry. The technical problem to be solved by the invention is to provide the automatic feeding device for dairy cows in animal husbandry, which has an automatic feeding function, is simple in structure and saves resources. In order to solve the technical problem, the automatic feeding device for dairy cows in animal husbandry comprises a base plate, first springs, a press-button, an L-shaped support, a movable plate, a feedbox, a connecting rod, an L-shaped rod, a transverse plate, a first discharge pipe, an electronic control valve, a guide sleeve, a cylinder body, a piston, a T-shaped push rod, a second discharge pipe, second springs, a motor, a gear, a first sliding rail, a first sliding block, a rack, a first pulley, a second sliding rail, a second sliding block, a third spring, a baffle plate, a second pulley, a pull rope and a feeding tank, wherein the first springs, the press-button and the L-shaped support are arranged on the base plate in sequence from left to right. The automatic feeding device achieves the effects that the device has the automatic feeding function, is simple in structure and saves the resources.