The invention provides an adjustable screw bolt support seat for a wood structure platform, an adjustable structure for the wood structure platform and the wood structure platform. The adjustable screw bolt support seat for the wood structure platform is fixedly connected with a support seat installing position of the wood structure platform, and comprises an angle bottom steel plate, a steel sleeve pipe and a leveling screw bolt; the angle bottom steel plate is in horizontal arrangement; screw holes and a hole are formed in the angle bottom steel plate; the steel sleeve pipe is vertically arranged and is provided with internal screw threads; the lower end of the steel sleeve pipe is fixedly connected onto the angle bottom steel plate and is communicated with the hole; the leveling screw bolt is connected into the steel sleeve pipe through screw threads; the upper end of the leveling screw bolt is provided with a small hexagon head; and the lower end surface of the leveling screw bolt is a spherical surface. The adjustable screw bolt support seat and the adjustable structure have the advantages that the bearing force is strong; meanwhile, the height is adjustable; the structure is simple; the operation is convenient; the repeated use can be realized; and the use is very flexible. The adjustable screw bolt support seat and the adjustable structure are suitable for various kinds of temporarily built dismountable wood structure platforms needing to be repeatedly used.