The principle of generating the spiral Bessel beam is theoretically analyzed. Based on the cross-spectral density function of Gaussian-Shell model and the theory of cross-spectral density propagation, the expression of partially coherent spiral Bessel beam is derived. The propagation characteristics of partially coherent spiral Bessel beam are studied and the influence of coherence on its transmission characteristics is analyzed. The results show that with the increase of transmission distance, the contrast of beam intensity distribution of beam cross section decreases, and the distribution of light field changes from the Bessel type to the Gaussian type. However, the beam still maintains the self-acceleration property. For the high-order beam, a phenomenon of dark core fading can be found easily and the fading distance of the dark core increases with the increasing of the beam order. With the decreasing of the coherent length, the distribution of Bessel light field decreases gradually, and the non-diffraction distance of the beam is shortened. Moreover, the influence of light field regulation on the beam is also discussed, which includes the parameter setting of the hologram and the adjustment of the coherence of the light field.