In order to improve the torpedo interception probability of the suspended depth charge under the influence of ocean current, this paper establishes a simplified model of ocean current to offset the placement certificate of suspended depth charge, analyzes the shortage of ocean current correction by using nonstandard shooting condition correction method, then presents a method of ocean current correction based on relative motion, calculates the parameters of the suspended depth charge under the influ- ence of ocean current; verifies theoretically whether to consider and correct the influence of ocean current on the torpedo interception effect of suspended depth charge by computer simulation. The results show that when the torpedo alarm distance is long and the cur- rent velocity is 3 kn, the interception probability of the suspended depth charge can be improved by 10% ~ 20% by correcting the in- fluence of current.