The invention discloses an establishment method for a walnut grove on Yunnan mountain land. The method is characterized in that splitting and digging are conducted between every two rows of walnut trees along the contour line year by year to form straight ridges, and the splitting and digging height is 5-10 cm every year; the soil ridges are built, meanwhile mellow soil on a platform is levelled,weeds obtained through soil ridge splitting and digging and platform clean-up are piled on ridge heads along the ridge line, and then immature soil obtained through soil ridge splitting and digging ispiled on the weeds. By adopting the method for grove establishment, the construction cost is reduced, soil quality is improved constantly, damage to the vegetation is smaller, the vegetation can easily recover, and the walnut setting rate is generally increased by 2.8%-20%.