Disclosed is a head-mounted display device, including a main body portion with an ocular lens, and further including an adjustment assembly which is connected to the main body portion and is used for adjusting a positional relationship with respect to the main body portion, wherein the adjustment assembly includes a shielding portion; when the adjustment assembly is in a first operating state, the shielding portion is away from the main body portion for realizing a wearing function; and when the adjustment assembly is in a second operating state, the shielding portion is close to the main body portion for shielding the ocular lens, thereby realizing convenient and quick storage and safekeeping, and facilitating the prolonging of the service life of the head-mounted display device.