Czerny-Turner type grating spectral detection technology has become a hot spot in modern spectral instrument research due to its uniform dispersion, high sensitivity, and wide spectral detection range. It is widely used in biology, medicine, materials science and other fields, but is limited by astigmatism It is difficult to further improve the imaging quality and resolution of the system. In order to solve the above problems, a high-resolution Czerny-Turner spectral detection technology based on toric mirror is proposed. The astigmatism is corrected by the different focal lengths of the toric mirror in the meridional and sagittal directions. On the premise of ensuring the advantages of high sensitivity and wide band of the C-T spectrometer, the imaging quality and the system resolution are improved. Theoretical analysis and experimental results show that the prototype of toric mirror destigmatism spectrometer based on spectral splicing technology of 10nm scanning interval reaches 0.020nm in the working band range of 400~800nm. This technique provides a feasible way to improve the resolution of C-T spectrometer.