The invention discloses a processing method for a tomato juice mackerel can. The processing method comprises step A, raw mackerel material preparation; step B, canning of mackerel meat; step C, ingredient preparation; step D, canning of juice; step E, sealing; step F, sterilization; step G, cooling; step H, packing/storage, wherein the step C and the step A or the step B can be performed simultaneously. The raw mackerel material preparation in the step A comprises step A1, raw mackerel material check; step A2, unfreezing; step A3, cutting; step A4, washing; step A5, salting; step A6, draining; step A7, impurity removing. The sterilization in the step F comprises step F1, filled can washing; step F2, can stacking; step F3, thermal treatment or sterilization. The tomato juice mackerel can produced through the processing method is delicious and good in taste and safe and sanitary, and nutritional ingredients can be well reserved.