The present invention discloses a large mining height full-mechanized caving mining method. The method comprises the following steps: (1) acquiring cohesion C, body force gamma and an included angle of velocity vector of a spalling rib slider with a sliding surface of a coal seam; and calculating coal wall critical stable height Hcr by a formula, if the coal wall critical stable height Hcr is no less than 6m, proceeding to steps (2)-(4); (2) determining a mining height H, and a caving height (0.5-1)*H; (3) conducting beveling feeding on an end of a coal face, and mining by using a unidirectional or bidirectional cutting manner; and (4) conducting caving by using one-mining and one-caving manner, single or double wheel sequential caving manner. The large mining height full-mechanized caving mining method enables top coal caving to effectively collapse, not only ensures the safety of coal mining, but also effectively improves the top coal recovery rate, improves the recovery of working face, reduces the loss of resources and improves economic efficiency compared with the prior art.