The invention relates to an arc extinguishing chamber, a contact assembly and a contact device thereof. The arc extinguishing chamber comprises a moving contact device and a stationary contact device. The stationary contact device comprises a stationary contact base on which at least two electrically connected stationary shunting contacts are separately arranged in the circumferential direction. The moving contact device comprises a moving contact base which is driven by an operating mechanism and rotates. The moving contact base is provided with moving shunting contacts which match the stationary shunting contacts in one-to-one correspondence. The moving shunting contacts are separately arranged in the circumferential direction of the moving contact base and are electrically connected. Switching-on or switching-off between the moving shunting contact and the matched stationary shunting contact is realized in rotation of the moving contact base relative to the stationary shunting contact. Switching-on or switching-off is realized through rotation, thereby reducing axial dimension of the arc extinguishing chamber so that size reduction and compact structure of the arc extinguishing chamber are realized. Furthermore, the plurality of moving shunting contacts and the corresponding stationary shunting contacts form multiple parallel loops with the shunting function, thereby effectively improving flow passing capability of the contact assembly.