The utility model relates to an axially layer by layer progressively increased chilled methanol to propylene (MTP) fixed bed reactor. The fixed bed reactor comprises a housing (1), a hot raw gas inlet (2), a product outlet (3), cold raw gas/liquid inlets (4), cold raw material distributors (5), cold raw material nozzles (6), catalyst beds (7), inert ceramic balls (8), nitrogen nozzles (9), lateral line gas phase annular manifolds (10), lateral line liquid phase annular manifolds (11), lateral line gas phase pipes (12), lateral line liquid phase pipes (13), nitrogen distributors (14) and nitrogen inlets (15). The reactor comprises four to six beds, zeolite-based MTP catalyst is filled on the beds layer by layer in a progressively increased manner. Hot gas of raw coarse dimethyl ether or refined methanol enters the first bed from to top; cold gas and liquid enter other beds from lateral lines; and mixture of hydrocarbons, which is rich in propylene, is output from the bottom. The reactor provided by the utility model has the advantages that the magnification is easy; the back-mixing is low; the temperature is easy to control; and the mechanical loss of catalyst is low.