Dose display assembly and injection device

The embodiment of the utility model discloses a dose display assembly and an injection device. The dose display assembly comprises a first shell, a graduated drum, a transmission drum and a main driving shaft, and an observation opening is formed in the side wall of the first shell; the main driving shaft is arranged on the inner side of the first shell, a driving part is arranged at the front end of the main driving shaft, and the main driving shaft is used for driving a component in butt joint with the driving part to rotate through the driving part. The transmission cylinder is located on the outer side of the main driving shaft and fixed to the main driving shaft in the circumferential direction. The graduated cylinder is slidably arranged on the transmission cylinder in a sleeving mode and fixed to the transmission cylinder in the circumferential direction, and the outer circumferential face of the graduated cylinder is in threaded connection with the inner circumferential face of the first shell. Power