[en] This paper considers the effect of radiation absorption and chemical reaction on MHD free convection heat and mass transfer flow of a micropolar fluid in a rotating system. A uniform magnetic field acts perpendicular to the porous surface in which absorbs micropolar fluid with a constant suction velocity. The entire system rotates about the axes normal to the plate with uniform angular velocity Ω. The governing dimensionless equations for this investigation are solved analytically by using regular perturbation method. The effects of the various flow parameters and physical properties on the velocity, microrotation, temperature and concentration profiles across the boundary layer are investigated through graphs. Also the numerical results of velocity profiles of micropolar fluids are compared with the corresponding flow problems for a Newtonian fluid. (author)