Along the southeastern margin of the Yangtze Carton expose several Neoproterozoic dioritic granitic plutonic complexes, which were considered as within plate plutons intruding along the Jiangshan Shaoxing suture belt between the Yangtze Carton and Cathaysia Block.This paper introduces petrography, chronology and geochemistry of Luodian intermediate acid plutonic complex in Jinhua, Zhejiang Province, and ascribed as TTG assemblage that including T 1 T 2 G 1 (tonalite trondhjemite granodiorite) and G 2 QM (granite quartz monzonite).They display typical geochemical characters of arc magmas, i.e., weakly negative Ce anomalies and obvious enrichments in LILE such as Rb, Ba, K, Pb, whereas depletion in HFSE such as Nb, Ta, Ti, P.T 1 T 2 G 1 ssemblages, showing high Na, low K with high Mg # (41 5~63 1) and ε Nd ( t ) (+2.6~+9.4), may be formed by the partial melting of dehydrated subducted basaltic slab and partly assimilated by mantle wedge.G 2 QM assemblages, having similar geochemical features to T 1 T 2 G 1 whereas comparatively higher K 2 O content (from 2.75 % to 5.08 %), higher LILE and LREE, and lower Mg # value (27.2~52.3) and ε Nd ( t ) (+1.7~+2.0), implicated the subsequent partial melting of the subducted slab but without obvious assimilation of mantle wedge.Their zircon U Pb ages of granodiorite(G 1 ),trondhjemite(T 2 ) and granite(G 2 ) are 841±10Ma(SHRIMP), 793±13Ma(LA ICP MS) and 832±44Ma, respectively, indicating these T 1 T 2 G 1 and G 2 QM rocks were continental margin arc magmatites formed by continuous subduction of Paleo Nanhua Ocean slab in Neoproterozoic.Combined with regional geologies and previous studies, it is proposed that, Luodian complex in Jinhua and Huangshan complex in Zhuji as well as Pingshui complex in Shaoxing make up a 200km long, Neoproterozoic (930~793Ma) continental margin arc plutonic complex zone.In other words, the southeastern margin of the Yangtze Carton had not collided and amalgamated with the Cathaysia Block at least until 793 Ma, while coexisting of T 1 T 2 G 1 G 2 QM rocks predicate an early middle subduction of oceanic crust.