The utility model discloses a multifunctional cooling sampling pipe which comprises a drill rod connector, a double-lead cooling sampling pipe and a drill bit, wherein the double-lead cooling sampling pipe and the drill rod connector are connected into a whole in an insertion manner; the drill bit is fixed at the other end of the double-lead cooling sampling pipe; an interface is arranged at the front end of the drill rod connector; the rear end of the interface extends out of an air-deflecting cooling sampling sleeve adopting a hollow structure; a groove concentric with the interface is formed in the front end of the interface; a cooling air channel matched with the groove is formed in the air-deflecting cooling sampling sleeve; a cooling air outlet communicated with the inside of the air-deflecting cooling sampling sleeve is formed in the outer wall of the air-deflecting cooling sampling sleeve; a cooling air inlet is formed nearby the outside of the cooling air outlet; and one end of the cooling air inlet is communicated with the side wall of the cooling air channel, and the other end of the cooling air inlet is communicated with an air inlet groove of a spiral cooling tank. The multifunctional cooling sampling pipe is simple in structure and convenient to operate and has the benefits of spiral pipe wall cooling, anti-slip locking, rapid back cutting and spiral powder discharge, in-hole pipe purification and automatic switchover of drilling sampling as well as coal sample coking resistance, loss prevention, sample mixing prevention, pipe clamping prevention and the like.