The invention discloses a graphene feed liquid deacidification method and device, and belongs to the technical field of graphene production, wherein the graphene feed liquid deacidification method specifically comprises the following steps: S101, feeding to-be-treated graphene feed liquid into a storage tank for preliminary precipitation; S102, removing impurities from the bottom of the precipitated graphene feed liquid, pressurizing the graphene feed liquid through a pressurizing pump, and feeding the graphene feed liquid into ceramic membrane equipment; and S103, carrying out nanofiltration filtration deacidification on the graphene feed liquid entering the ceramic membrane equipment through a ceramic membrane, and fully filtering to obtain a ceramic membrane concentrated solution. According to the method, the graphene feed liquid is subjected to ceramic membrane deacidification, the ceramic membrane concentrated solution is obtained, the molecular weight cutoff of a ceramic membrane used in the ceramic membrane deacidification is 10-50 nm, the pressure intensity of the ceramic membrane deacidification is 0.3-0.6 MPa, and the content of sulfuric acid in the concentrated solution treated through the ceramic membrane is greatly reduced; and through effective concentration and filtration of the graphene feed liquid, the operation time is shortened, the water consumption is reduced, and the production cost is reduced.