The invention discloses a waste rock discharging and sorting comprehensive treatment method for underground lump 
coal, which comprises the following steps of: transporting raw 
coal of a mining area to a tunnel provided with a 
rolling disk screen through a raw 
coal incoming material 
belt machine to perform grading treatment; directly feeding the screened substances into an underground primary coal transportation 
belt machine, feeding the granular coal on the screen into a fixed grate screen, and feeding the screened coal into an underground mechanical movable 
sieve jig to perform sorting; conveying the sorted lump coal to a tunnel lump coal removal 
belt machine, and conveying the sorted lump waste rock to a tunnel lump waste rock removal belt 
machine till an underground waste tunnel or an underground waste rock filling 
system; and pumping the sorted 
coal slurry to a high-frequency screen through a 
coal slurry pump to intercept coarse coal, then dehydrating the 
coal slurry, and recycling filtrate so as to realize closed cycle of washing water. The method discharges waste rocks from the lump coal by adopting the underground mechanical movable 
sieve jig adaptive to the 
underground tunnel chamber operation, occupies a little space, is convenient for mounting and underground chamber operation, has simple process flow, can effectively reduce 
pollution, is favorable for 
environmental protection, saves a large amount of resources, saves manpower and resources, and remarkably improves the sorting operation efficiency and the lump coal yield.