In this work, an alternative method is proposed to realize terahertz far-field super-resolution imaging. Due the unique dispersive properties of the spoof surface plasmon (SSP), the spatial spectrum of the targets can be extracted and conserved by the adjacent SSP structure through a frequency canning operation. With the assist of a broadband coupler, the sampled information can be sent and retrieved in the far-filed. Then, the image with subwavelength resolution is constructed by inverse Fourier Transform. Although the resolution of $0.1\lambda$ is verified, the resolution can be further enhanced by optimizing the SSP structure. This work may find applications in non-destructive testing and biomedical imaging.