The invention discloses a thin film capacitor for an electric vehicle dual-motor controller, which comprises a housing, an inverted L-shaped upper layer copper bar, an L-shaped lower layer copper bar, a copper bar insulating layer, two core components and a potting layer. Vertical ends of two copper bars are isolated by the copper bar insulating layer; the cross end of the inverted L-shaped upper layer copper bar and the cross end of the L-shaped lower layer copper bar are arranged up and down; each cross end is respectively provided with two separated welding parts; teach of wo core components is arranged between two opposite welding parts; three groups of pins are arranged outside the vertical ends of two copper bars and extend to the outer side of the housing; two groups of pins respectively correspond to two core components; and the third group of pins are power supply pins. The thin film capacitor has the following beneficial effects that (1) an effect that a controller assembled on one capacitor controls two motors to synchronously work is achieved; (2) an effect of arranging two independent capacitors in one capacitor shell is achieved; and (3) a resistance-welding process is adopted, so that reliability and production efficiency of the product are promoted.