Under-ice depth control ice breaking bomb with automatic destruction function

The utility model relates to an under-ice depth control ice breaking bomb with an automatic destruction function. The under-ice depth control ice breaking bomb comprises an ice breaking bomb main body, a detonator automatic destructor and convection holes formed in the peripheral wall at the lower end of a bomb body and used for destroying explosive in the bomb body. The ice breaking bomb main body comprises the bomb body, a floater, an inner end cover, an outer end cover, a detonation timer positioned in the inner end cover and a waterproof plug positioned on the outer end cover. A floater chamber matched with the floater is formed in the lateral wall of the bomb body, the floater and the bomb body form a cylindrical whole and are fixed by water soluble ties after the floater is arranged in the floater chamber, and the floater is connected with the bomb body through two depth control lifting ropes. The detonator automatic destructor comprises a destructor body and a sealing end cover, wherein a corrodent sto