This paper deals with differentiation and spatial distribution of pegmatite type K-feldspar deposits in north Liaoning by the example of the Wanlongbei K-feldspar deposit. The study indicates that Neoarchean crust-derived magmatogenic K-feldspar may be divided into endozone, middle zone and exozone. Massive K-feldspar in the endozone and graphic K-feldspar in the middle zone are good in quality. Exploitation of K-feldspar in north Liaoning is discussed.