Disclosed is a process for co-producing ethylene and dimethyl ether comprising the steps of (i) providing raw materials containing ethanol and methanol in a weight ratio of methanol to ethanol of from 1:10 to 10:1; (ii) feeding said raw materials into a reaction area containing solid catalysts to obtain an effluent, wherein the reaction temperature in the reaction area is 200-480?, the reaction pressure is 0-2 MPa (gage pressure), and the WHSV of raw materials is 0.1-10 h<sp>-1</sp>, and wherein said solid catalyst is selected from the group consisting of alumina catalyst and crystalline aluminosilicate catalyst; and (iii) separating ethylene and dimethyl ether from said effluent obtained in step(ii).
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