The invention discloses a recycling method of lithium cobaltate and graphite in a waste lithium ion battery. The recycling method comprises the following steps: a, discharging, dismounting and crushing the waste lithium ion battery to form a mixed material; b, sieving the mixed material to obtain a fine-grain-grade mixed material; c, enabling the obtained fine-grain-grade mixed material to enter a friction charging device to charge; d, inputting the charged fine-grain-grade mixed material into a static sorting machine to be sorted; and e, collecting the lithium cobaltate and the graphite from a product collection groove of the static sorting machine respectively. The preparation work before sorting is simple and the material only needs to be crushed and sieved, so that a lot of time can be saved; the lithium ion battery can be completely crushed by using crushers with different grain grades so that the sorting efficiency is greatly improved; the fine-grain-grade mixed material is obtained by utilizing granularity difference to sieve, and friction electric sorting is carried out; and the lithium cobaltate and the graphite of the lithium ion battery can be sufficiently recycled, and the fine-grain-grade mixed material is sorted, and the effect is obvious and the collection is convenient.