The present invention relates to a method for the continuous production of hydrocarbons from synthesis gas in the presence of a catalyst comprising a synthesis step in which a synthesis gas is reacted in the presence of a catalyst in a Fischer-Tropsch synthesis reactor (4), characterised in that, at the same time as the synthesis step, the following successive steps are carried out: a) charging a catalyst precursor comprising cobalt oxide in a reduction reactor (2); b) reducing the catalyst precursor charged in step a) by placing it in contact with a reduction gas comprising hydrogen (H2) and/or carbon monoxide (CO); and c) introducing the catalyst reduced in step b) into the synthesis reactor (4).