The invention discloses a fuel gas and EGR (exhaust gas recirculation) integrated mixer. The mixer comprises an EGR mixer and a fuel gas mixer which are integrated and communicated with each other, wherein an integration mixer inlet used for being connected with a throttle gate is formed in the EGR mixer; an integration mixer outlet used for being connected with an engine intake duct is formed in the fuel gas mixer. According to the fuel gas and EGR (exhaust gas recirculation) integrated mixer, provided by the invention, the integration level is high, transient state response is good, the gas mixture concentration control following performance is good, the mixing uniformity of exhaust, fresh air and fuel gas is high, the structure is simple and reasonable, the occupied space is small, the disassembly and assembly is convenient, and the manufacturing cost is lower.