The utility model discloses a wire seat capable of being tightened, which comprises an upper pressure block and a plurality of lower holders connected at the bottom of the upper pressure block. The middle parts of the lower holders are respectively provided with grooves. The middle of the upper pressure block is provided with a boss which is inserted into the grooves in the middle of the lower holders; a bolt passes through the upper pressure block, the boss in the middle of the pressure block, the grooves in the middle of the lower holders and the lower holders sequentially front top to bottom so as to fix the lower holders at the bottom of the upper pressure block. The wire seat capable of being tightened has simple structure and is easy to install. A plurality of lower holders are respectively connected at the bottom of the upper pressure block by the bolt and a hold formed by the upper pressure block and the lower holders is used for clamping a wire. The aim of regulating tightness degree of the wire seat can be fulfilled by regulating the bolt, and thus, the wire seat does not need to be replaced frequently so as to greatly save raw materials and also be convenient for daily maintenance.