The invention discloses a walnut feeding, conveying, isolating and shelling all-in-one machine which consists of a main machine seat, a feeding and conveying device, a vibrating and conveying device, an isolating device, a shelling device and a power transmission. The feeding and conveying device, the vibrating and conveying device, the isolating device, the shelling device and the power transmission are mounted on the main machine seat. Compared with the prior art, the walnut feeding, conveying, isolating and shelling all-in-one machine has the following advantages that an integrated design method integrating feeding, conveying, isolating and shelling is adopted, and mechanization, automation and integration degrees of the total machine are high; walnuts are supplied by the aid of a conveying belt, a vibrating disc, an isolating device and a conveying disc, so that supplying speed is flexible and adjustable, labor cost is effectively reduced, and processing efficiency is improved; and the linear reciprocating latch type isolating device and the cylindrical cam indexing type conveying disc are adopted, so that coordinated, orderly and efficient running is realized in a walnut shelling process, and the walnut feeding, conveying, isolating and shelling all-in-one machine is applicable to industrialized, standard and large-scale production. In addition, a work mode is reliable, shelling efficiency is high, and accordingly the walnut feeding, conveying, isolating and shelling all-in-one machine is popularized and applied conveniently.