The invention relates to a bidirectional injection pump thickened oil viscosity reduction and fracturing or acidizing combined tubular column. The bidirectional injection pump thickened oil viscosity reduction and fracturing or acidizing combined tubular column is characterized by comprising a lower part oil tube, a sliding sleeve I, a packer, an injection pump barrel and an upper part oil tube which are sequentially connected from bottom to top, the sliding sleeve I is connected with a bottom valve assembly, and the integral bidirectional injection pump thickened oil viscosity reduction and fracturing or acidizing combined tubular column is formed. A combination technology comprises the steps that the tubular column is formed by sequent connection from bottom to top; the packer setting is carried out, and annular pressing examining seal packer is carried out; fracturing or acidizing construction is carried out; the bottom valve assembly 22 is input, and oil tube presses to open the lower part sliding sleeve; annuls pressing is carried out, an injection pump sliding sleeve 18 is opened, and the tubular column above the packer communicates with annulus; a bottom valve ball II is input; an injection pump core is input; a ground pump presses and injected with power liquid, a bottom valve upper ball seat is opened, so that the bottom valve assembly communicates with the lower part oil tube, divided flow body flows to the well bottom along the oil tube below the bottom valve assembly, and viscosity reduction is carried out on shaft bottom crude oil. The bidirectional injection pump thickened oil viscosity reduction and fracturing or acidizing combined tubular column has the beneficial effects that the thickened oil viscosity reduction and fracturing or acidizing combined construction can be realized.