The Jingpohu (Jingpo Lake) volcanic belt of Heilongjiang Province is lo cated on the w est sid e of the DunhuaMishan fault belt. The Holocene basalt occurs in the areas of t he "Crate r Forest" and "Frog Pool". 14C isotopic dating for the gagatite hosted in the sco ria shows that the basaltic magmatism in the two areas occurred in 2470 a and 34 9 0 a respectovely. However,the basaltic r ocks of the two areas which are 15 km apart show obvious differences in lithology. Th e rocks in the "Crater Fore st" are alkaline olivine basalt whereas these in the "Frog Pool" are leucite tep hrite. T here are also remarkable differences in characteristics of petrochemistry, t race e lement geochemistry, REE geochemistry and mantle xenoliths between the two areas . A systematic study of the Sr, Nd and Pb isotopic compositions of the Quater na ry basalts in the Jingpo Lake area has been made for the first time,which shows tha t they have some similarities in Sr, Nd and Pb isotopic compositions. The basaltic rocks in both areas have low Srand Pbisotopic values and relatively high Nd values （87Sr/86S r =0.70396～0.704537；143Nd/144Nd=0.512656～0.512786； 206Pb/204Pb=17.0856～17.5034；207Pb/204P b=15.2689 ～15.3461；208Pb/204Pb= 37.0999～37.4363）. In the "Crat er F ores t", the earlier basalts have higher Sr isotopic values and lower Nd isoto pi c values than the later ones.This suggests that the source region of the later b asalts is mor e depleted. All of them are projected on the SrNd, SrPb, NdPb and PbPb d ia gram s between the two end members of DMM and EMI, which implies that the source regi on consi sts of a mixture of the two end members, and other two end members (EMⅡ and HIM U) are rarely contributed. It is explained in the paper that it is related to th e parti al melting resulting from the activity of mantle plume containing recirculatin g lowercrustal materials. However,metasomatism occurred before the partial melt i ng, which led to the recent enrichment.