The invention relates to a wearable device and touch pen, belonging to the field of wearable technology. The wearable device comprises a fastening strap and a wearable device body connected to the fastening strap. The fastening strap is provided with at least one fastening member, each fastening member being configured to fasten a touch pen to the fastening strap. The touch pen is configured for performing a touch operation on a touch screen of the wearable device body. The fastening strap and the wearable device body are capable of forming an enclosed circle. The present invention solves the problem of low precision of touch operations on the touch screen of the wearable device body, improving the precision of touch operations, and is applicable to wearable devices.