  We consider the accretion process in the thin disk around a supermassive
black hole in Einstein-aether-scalar theory. We probe the effects of the model
parameter on the physical properties of the disk. The results show that with
increasing value of the parameter, the energy flux, the radiation temperature,
the spectra cut-off frequency, the spectra luminosity, and the conversion
efficiency of the disk decrease. The disk is hotter and more luminous than that
in general relativity for negative parameter, while it is cooler and less
luminous for positive parameter. We also find some values of the parameter
allowed by the theory are excluded by the physical properties of the disk.
