The global kinetics of direct synthesis of dimethyl ether from syngas over bifunctional catalyst mixed by methanol synthesis catalyst and dehydration catalyst was obtained. The experiment was ex-(ecuted) at 220~260 °C, 5 MPa, 1 000~2 000 mL/(g·h) and the rotation of the basket was 2 600 r/min. The model is reliable and adequately describes the experimental results. The effects of temperature and content of N_2 were compared with the calculated results based on the intrinsic kinetics or global kinetics we ob...