The invention belongs to the field of oil field underhole tools, and particularly relates to a step-by-step releasing packer capable of being repeatedly utilized. The step-by-step releasing packer capable of being repeatedly utilized comprises an upper connector, an upper outer cover, a shearing body, a center pipe, a lining pipe, a glue cylinder component, a pressing ring, a set packer dowel, a releasing dowel, a snap spring component, a snap spring cover, a set packer piston set, a lower outer cover and a lower connector, and is characterized by further comprising a well washing valve component, a limiting cover and an opening cover. According to the step-by-step releasing packer capable of being repeatedly utilized, a lifting mechanical releasing mode is adopted, during lifting, the packer is released from the top to the bottom, the situation that releasing dowels of multiple packers are under stress simultaneously does not exist, and therefore the problem is avoided that in a common packer, since the level is too many, the lifting releasing force is too large. According to the step-by-step releasing packer capable of being repeatedly utilized, a balanced structural design is adopted, in the process of setting, water injection and injection stopping, the unpacking dowel is not under stress, and accidental releasing can be effectively unpacked.