〔Abstract〕 Objective To investigate the dosimetric differences and advantages between helical tomotherapy and volumetric rotary intensity-modulated radiotherapy for cervical cancer. Methods 20 patients with cervical cancer admitted to the First Affiliated Hospital of Bengbu Medical College from January 2021 to January 2022 were selected. All patients were treated with helical tomotherapy (data as the control group), and after 4 weeks of treatment, they were adjusted to volumetric rotary intensity modulated radiotherapy (data as the observation group). The dosimetric differences between the two radiotherapy methods were compared. Results The maximum dose (D1, D2), average dose (Dmean) and target homogeneity index (HI) of the observation group were higher than those of the control group, and the prescription dose coverage (D95), near minimum dose (D98), conformal index (CI), treatment time and treatment hop number of the observation group were lower than those of the control group. The bladder Dmean, 45 Gy radiation dose volume percentage (V45), 40 Gy radiation dose volume percentage (V40), 30 Gy radiation dose volume percentage (V30) and V45 and V40 of femoral head were higher than those of the control group, while the femoral head Dmean and V30 were lower than those of the control group, the differences were statistically significant (P < 0.05). Conclusion In the radiotherapy of cervical cancer, helical tomotherapy has obvious dosimetric advantages, and the target volume conformation and dose uniformity are better, the treatment time of volumetric rotary intensity modulated radiotherapy is shorter, and the treatment efficiency is better. In actual diagnosis and treatment, physicians can choose the appropriate radiotherapy method according to the patient's specific condition and individual differences.