The utility model belongs to the expansion joint compensation technical field and provides a straight pipe pressure-balancing type expansion joint for a gasoline adsorption and desulfurization device. The expansion joint is mainly composed of an inlet flange (1), a pull rod (2), a guide cylinder (3), a working corrugated pipe (5), a balancing corrugated pipe (9), a middle pipe (7) and an outlet plate (12), wherein the working corrugated pipe (5) and the balancing corrugated pipe (9) are connected by the middle pipe (7). The straight pipe pressure-balancing type expansion joint is characterized in that a guide cylinder positioning slot is arranged on the inlet flange (1) and the middle pipe (7), one end of the guide cylinder (3) is positioned in the positioning slot, and the other end of the guide cylinder (3) is in a staircase-shaped structure; the middle pipe (7) and a middle annular plate (8) are in the structure formed by integrally forming forgings; and the end part of the pull rod (2) is provided with a spherical conical-surface gasket (13). The straight pipe pressure-balancing type expansion joint ensures the strength of the guide cylinder and the flowing smoothness of mediums, reduces the abrasion of high-speed flowing adsorbent particles for the guide cylinder and prolongs the service life of the expansion joint.