The invention provides a double-laser system for precision measurement of cold atom interferometry. The system comprises a master laser, a master laser frequency stabilizing module, a first beam splitting module and a first frequency shift and beam splitting unit which are used for supplying back pumping light and raman master laser. The system further comprises a slave laser, a slave laser lock phase frequency stabilizing module, a second beam splitting module, a laser amplifier and a second frequency shift and beam splitting unit which are used for supplying raman slave laser, cooling light,detecting light, cleaning light and state preparation light; the raman master laser and the reman slave laser are utilized for producing reman laser through a raman light frequency shift unit. The system is simple, compact and stable in structure, novel and flexible in frequency regulation, and applicable to miniaturization, engineering and productization, and particularly supplies laser solutions to cold atom interferometry based absolute gravimeters, gradometers, gyroscopes and the like.