Signature, widely used in cloud environment, describes the work as readily identifyingits creator. The existing signature schemes in the literature mostly rely on theHardness assumption that can be easily solved by quantum algorithm. In this paper, weproposed an advanced quantum-resistent signature scheme for Cloud based on EisensteinRing(ETRUS) which ensures our signature scheme proceed in a lattice with higher density.We proved that ETRUS highly improve the performance of traditional lattice signatureschemes. Moreover, the Norm of polynomials decreases significantly in ETRUS whichcan effectively reduce the amount of polynomials convolution calculation. Furthermore,storage complexity of ETRUS is smaller than classical ones. Finally, according to all convolutionof ETRUS enjoy lower degree polynomials, our scheme appropriately accelerate56.37% speed without reducing its security level.