A wearable device, comprising: a wearable assembly and a display device detachably mounted on the wearable assembly, and the display device comprises: a first body, having a connecting end; a second body, which is rotatably connected to the connecting end of the first body, and can be folded inwardly toward the first body to overlap with the first body, and after the second body is detached from the wearable assembly, the second body can be folded outwards away from the first body to unfold relative to each other; and a flexible display device, which is covered on the first body and the second body, and can be folded inward or unfolded outward correspondingly with mutual rotation between the first body and the second body; characterized in that the wearable device further comprises a lock mechanism, wherein: the wearable assembly comprises: a watch band; and a bracket connected to the watch band, and the second body is detachably connected to the bracket through the lock mechanism; the lock mechanism comprises: a lock button having one end inserted into the bracket; a lock buckle, both ends of which are respectively inserted into the bracket and the second body and abut against the one end of the lock button passing through the bracket; a first return spring, having one end connected to a side of the lock button (3 1) facing the lock buckle and the other end connected to the bracket; and, a second return spring, having one end connected with the lock buckle and the other end connected with the second body; wherein when the other end of the lock button is pressed, the lock button pushes the lock buckle to be separated from the bracket, so that the first return spring and the second return spring are respectively in a compressed state. a first body, having a connecting end; a second body, which is rotatably connected to the connecting end of the first body, and can be folded inwardly toward the first body to overlap with the first body, and after the second body is detached from the wearable assembly, the second body can be folded outwards away from the first body to unfold relative to each other; and a flexible display device, which is covered on the first body and the second body, and can be folded inward or unfolded outward correspondingly with mutual rotation between the first body and the second body; characterized in that the wearable device further comprises a lock mechanism, wherein: the wearable assembly comprises: a watch band; and a bracket connected to the watch band, and the second body is detachably connected to the bracket through the lock mechanism; the lock mechanism comprises: a lock button having one end inserted into the bracket; a lock buckle, both ends of which are respectively inserted into the bracket and the second body and abut against the one end of the lock button passing through the bracket; a first return spring, having one end connected to a side of the lock button (3 1) facing the lock buckle and the other end connected to the bracket; and, a second return spring, having one end connected with the lock buckle and the other end connected with the second body; wherein when the other end of the lock button is pressed, the lock button pushes the lock buckle to be separated from the bracket, so that the first return spring and the second return spring are respectively in a compressed state. the wearable assembly comprises: a watch band; and a bracket connected to the watch band, and the second body is detachably connected to the bracket through the lock mechanism; a watch band; and a bracket connected to the watch band, and the second body is detachably connected to the bracket through the lock mechanism; the lock mechanism comprises: a lock button having one end inserted into the bracket; a lock buckle, both ends of which are respectively inserted into the bracket and the second body and abut against the one end of the lock button passing through the bracket; a first return spring, having one end connected to a side of the lock button (3 1) facing the lock buckle and the other end connected to the bracket; and, a second return spring, having one end connected with the lock buckle and the other end connected with the second body; wherein when the other end of the lock button is pressed, the lock button pushes the lock buckle to be separated from the bracket, so that the first return spring and the second return spring are respectively in a compressed state. a lock button having one end inserted into the bracket; a lock buckle, both ends of which are respectively inserted into the bracket and the second body and abut against the one end of the lock button passing through the bracket; a first return spring, having one end connected to a side of the lock button (3 1) facing the lock buckle and the other end connected to the bracket; and, a second return spring, having one end connected with the lock buckle and the other end connected with the second body; wherein when the other end of the lock button is pressed, the lock button pushes the lock buckle to be separated from the bracket, so that the first return spring and the second return spring are respectively in a compressed state.