The utility model provides a diesel engine alcohol injector with an EGR function. The diesel engine alcohol injector is used for providing alcohol fuel for an engine cylinder (2). The diesel engine alcohol injector comprises an alcohol injection nozzle (5), an alcohol supply rail (6) and an EGR pipeline (4). One end of the EGR pipeline (4) is communicated with an engine exhaust pipe. The other end of the EGR pipeline (4) is communicated with an engine intake pipe (1). The alcohol injection nozzle (5) is arranged at the front end of the joint between the EGR pipeline (4) and the engine intake pipe (1). One end of the alcohol injection nozzle (5) is fixed to the alcohol supply rail (6). The other end of the alcohol injection nozzle (5) is inserted in the engine intake pipe (1). The diesel engine alcohol injector is novel in design, simple in structure and beneficial for improving the thermal efficiency of an engine; particulate emissions of the engine are substantially reduced.