The invention relates to the field of ophthalmic medical instruments, and in particular to an adjustable shadowless lamp for an ophthalmic operating room. The adjustable shadowless lamp comprises a rolling wheel mechanism, a rotating circular hole is formed in the center of the left end of a base, a rotating shaft is sleeved with the rotating circular hole, the right end of the rotating shaft is fixedly connected with a rotating disc, a limiting clamping column is fixedly connected to the top end of the left side of a rotating handle, a driving gear is in gear fit with a rack, limiting blocksare arranged at the left end and the right end of the rack, the top end of the rack is fixedly connected with a connecting column, the connecting column is connected with a rotating column, a rotatingsupport is arranged at the top end of the rotating column, a clamping gear sleeves the middle of a clamping shaft, a movable shaft penetrates through the position, which is coplanar with the axis ofthe clamping shaft, of the right side of the upper end of the rotating support, the middle of the movable shaft is sleeved with a connecting tooth block, a clamping gear is in gear fit with the connecting tooth block, the side end of the connecting tooth block is fixedly connected with a lamp support, and a shadowless lamp body is installed on the lamp support. According to the shadowless lamp, moving and fixing can be convenient, meanwhile, fixed-point placement in any direction within a reachable range can be achieved, and moreover, the stability is good.