The invention discloses a hydraulic control pipeline shaft bottom pressure relief pen which comprises an upper connector, a lower connector and a piston. The lower end of the upper connector is connected with the upper end of the lower connector. The upper connector and the lower connector are connected and then form a piston cavity in between. The piston is installed in the piston cavity. A through center hole is formed in the piston. A radial first hydraulic pore is formed in the lower end of the upper connector. A radial second hydraulic pore is formed in the lower end of the piston. The first hydraulic pore is communicated with the second hydraulic pore. The requirements for seal examining and seal relieving in the process of construction and then instantly putting down a pipe column can be met, a downhole tool is protected, and meanwhile a large amount of operation time is saved; the downhole tool has a rapid pressure relief function, the maintenance efficiency of a completion pipe string of an oil-water well can be improved, and the service life of the downhole tool is prolonged.