Respiratory muscle rehabilitation exercise instrument

The utility model discloses a respiratory muscle rehabilitation exercise instrument, which relates to the technical field of respiratory exercise and comprises a training base, a first connecting shell is fixedly arranged on the training base, an annular seat is integrally arranged in the first connecting shell, and a training cavity is defined by the annular seat, the training base and the first connecting shell. A breathing channel communicated with the training cavity is formed in the axis end of the annular base, and one side of the training cavity is connected with an air inlet channel. A second connecting shell is arranged on the first connecting shell, a sealing plate used for blocking the breathing channel is arranged in the second connecting shell, and the sealing plate is connected with an elastic mechanism; the elastic force adjusting mechanism is used for adjusting the initial elastic force of the sealing plate and the elastic force mechanism; when the respiratory muscle training strength needs to