The utility model discloses a single current valve blanking plug is filter equipment by oneself is connected with single current valve blanking plug, single current valve blanking plug is provided with the self filtering nipple joint bottom, the self filtering nipple joint includes the self filtering body, top -down comprises tertiary filter screen, fender ring A, secondary filter net, fender ring B, one -level filter screen and salvage ring in proper order in the cavity of self filtering body, it is to count the from big to small range according to the mesh: tertiary filter screen, secondary filter net, one -level filter screen. The utility model discloses avoid because of there being impurity to make single current valve ball base sealed not tight in the completion fluid, lead to the condition that the pressure testing did not live, through step and the next spacing adjustment self filtering nipple joint of bottom, can change the filter screen grade according to the completion fluid impurity circumstances and meet the demands.