Pressure-controllable plastic container sealing device

The invention relates to a pressure-controllable plastic container sealing device. The pressure-controllable plastic container sealing device comprises a driving mechanism, a pushing mechanism and a sealing mechanism, wherein the driving mechanism is controlled and driven by an upper computer; and the pushing mechanism comprises a lead screw and a nut arranged on the lead screw in a sleeving mode. The sealing mechanism comprises a connecting piece connected with the nut, a pressure sensor connected with the connecting piece and a heat sealing head connected with the pressure sensor; the lead screw is driven by the driving mechanism to transmit, so that the nut moves along the lead screw, then the heat sealing head is driven to press down a container opening of a plastic container to be sealed, the pressure sensor detects the real-time pressing-down pressure and feeds back the pressure to the upper computer, and then the driving mechanism is controlled; and after the pressure reaches the preset pressure thresh