Adjustable supine board

The invention belongs to the technical field of fitness equipment, in particular to an adjustable supine board. The adjustable supine board is characterized in that at least two parallel ratchet bars are arranged on a base; ratchets of the ratchet bars are arranged in the manner of facing opposite to adjacent front and back supports; a front support is rotatably connected with a support board and comprises a front adjusting mechanism erected on the ratchet bars; a back support is rotatably connected to the supine board and comprises a back adjusting mechanism erected on the ratchet bars; the front adjusting mechanism and the back adjusting mechanism are erected between different ratchets on the ratchet bars so that angles and heights of the supine board can be adjusted; due to the fact that the ratchets are arranged by being opposite to the adjacent front and back supports, front and back adjustments and stress do not generate displacement; and compared with the prior art, the fixing mode of a cross support a