The utility model discloses a bulb replacement tool, which comprises a rod body, wherein the top end of the rod body is coaxially provided with a supporting member, the peripheral part of the supporting member is provided with at least two grabbing members, the top ends of the grabbing members are matched with a bulb, the tail ends of the grabbing members are hinged at the peripheral part of the supporting member, the extension direction of a rotating axis of the grabbing member is vertical with the extension direction of an axis of the rod body, the middle part of the supporting member is provided with a guide member in an insertion mode telescopically and coaxially along the axial direction, and the guide member is provided with guide holes which are in one-to-one correspondence relation with the grabbing members and matched with the grabbing members in insertion; a tail section of the grabbing member is provided with an expanded circular arc section, the center of the expanded circular arc section is located at the outer side of the grabbing member, a middle section of the grabbing section is provided with a contracted circular arc section, and the center of the contracted circular arc section is located at the inner side of the grabbing member; and the middle part of the rod body is provided with a through hole extending along the axial direction, the guide member penetrates through the supporting member and inserted into the through hole, and the bottom part of the guide member is connected to a control member which penetrates through and extends out of the rod body. The bulb replacement tool disclosed by the utility model can improve the safety of the bulb replacement process.