This paper deals with concentrations and characteristics of rare earth elements and other incompatible elements for Linju basalts. According to their chondrite-normalized distribution patterns, they show the LREE enrichment which is common for most continental basalts.In incompatible elements diagram, compared with continental rift basalts, they show depleted in Rb, relative high in K and lower in total REE. The general pattern is similar with ocean island alkali basalts, and differs from continental rift basalts and other various deep source rocks. It is implied that the genesis of Linju basalts was probably resemble with ocean islands. This feature of Linju basalts was suited to their tectonic setting.We proposed that Linju basalts can be formed by mixing of melting of deep plume source with MORB-like source sited subcontinental lithosphere bottom. In terms of three constraint equations containing isotopes and trace elements. we calculated the rate of mixing of two magma sources and degree of partial melting. It is denoted that Linju basalts could be generated by partial melting of less than 1% for MORB source and 9--23% of partial melting for plume source, and about 9--50% rate of mixing.