The invention relates to an absorption device, in particular to a forced convection absorption device. The device comprises a falling film system and a cooling system, wherein the falling film system comprises a liquid distribution hole. The device also comprises a wind guide system which causes saturated steam to quickly impact a lithium bromide solution adsorption surface. According to the forced convection absorption device, the forced convection absorption of the lithium bromide solution can be realized, the mass transfer driving force of a gas-liquid interface is increased to be convenient for cooling the solution, the mass transfer coefficient is improved, and the adsorption rate is improved.