The invention relates to the field of printers and discloses a semi-automatic circular shell label printer. The semi-automatic circular shell label printer comprises a working table. A rack is fixed to the working table. The lower end of the rack is provided with a first ink cartridge and a second ink cartridge. The upper end of the rack is provided with a first printing glue head and a second printing glue head which move front and back. The first printing glue head and a second printing glue head can also lift up and down to dip ink in the first ink cartridge and the second ink cartridge. The first printing glue head and the second printing glue head can be driven by second telescopic rods to stretch into the first ink cartridge and the second ink cartridge. Logos on the first printing glue head and the second printing glue head are printed onto outer circumferential surfaces of bearings through the first printing glue head and the second printing glue head. The semi-automatic circular shell label printer can automatically print the logos onto the outer circumferential surfaces of the bearings and is easy to operate and good in printing effect, and the printing efficiency is effectively improved.