Integrated SCR assembly

The utility model discloses an integrated SCR assembly. The integrated SCR assembly comprises an AdBlue tank, a support assembly, a metering pump support, an air filter support, a metering spraying pump, an air filter and a DCU assembly. The left half portion of the AdBlue tank is higher than the right half portion of the AdBlue tank. A connector portion is arranged on the top face of the left half portion. A first annular groove is formed in the side face of the connector portion. A second annular groove is formed in the right half portion. Two installation grooves are symmetrically formed in the outer side face of the AdBlue tank in the circumferential direction. The support assembly comprises an AdBlue tank installation base. The AdBlue tank installation base comprises two first installation rings matched with the installation grooves, a second installation ring matched with the first annular groove and a third installation ring matched with the second annular groove are arranged between the two first installation rings, first side walls perpendicular to each other are arranged between the second installation ring and the third installation ring, and a second side wall is arranged between the inner side faces of the right arms of the two first installation rings. The metering pump support comprises a DCU installation wall, an AdBlue tank installation wall and a metering pump installation ring. The air filter support is fixed to the AdBlue tank installation base. The integrated SCR assembly is low in fault rate and low in installation difficulty.