The invention provides a hydraulic valve for a differential loop and the hydraulic differential loop. The hydraulic valve for the differential loop comprises a valve body, a main valve element, a
pilot valve sleeve, a
pilot valve element and a thread sleeve
assembly, wherein the valve body is provided with an oil port A and an oil port B, the main valve element is connected into the valve body, the main valve element is provided with a first damping channel, the
pilot valve sleeve is connected into the valve body and connected with the main valve element through a first elastic piece, a control cavity is formed between the
pilot valve sleeve and the main valve element, the
pilot valve sleeve is provided with a
pilot valve element cavity, a through-flow hole and a second damping channel communicating with the control cavity, the pilot valve element is movably connected into the pilot valve element cavity, one end of the pilot valve element plugs a
valve opening, communicating with the second damping channel, of the pilot valve sleeve, the middle portion of the pilot valve element plugs the through-flow hole, the thread sleeve
assembly is connected to the outer side of the pilot valve sleeve in a sleeving manner and connected with the valve body, the thread sleeve
assembly is provided with a thread sleeve channel communicating with the oil port B, and the thread sleeve assembly is connected with the other end of the pilot valve element. The hydraulic valve for the differential loop simplifies the structure of the differential loop, reduces use of a controller and provides backpressure for the feeding working condition.