The invention relates to a synchronous rectification converter. The synchronous rectification converter comprises a power circuit and a control circuit, wherein the power circuit includes turn-off MOStubes and sampling MOS tubes, and the control circuit includes a start comparator, an adjustment control circuit, a turn-off comparator, a drive circuit and an output line loss compensation circuit,and the output line loss compensation circuit can achieve over-temperature protection. The control circuit outputs a drive signal GATE to the power circuit and receives a sampled signal VDET output bythe power circuit. The sampling MOS tubes accurately sample voltage signals VDET between source-drain electrodes of the turn-off MOS tubes, an adjustment signal is generated by the adjustment controlcircuit according to a set adjustment point, the driving signal GATE potential is adjusted in advance, the turn-off speed of the turn-off MOS tubes is significantly increased, and the reliability ofa power system using the synchronous rectification converter is improved significantly; and the bidirectional control of the adjustment control circuit carefully adjusts the GATE potential, so that the voltage between the source-drain electrodes of the turn-off MOS tubes is stabilized over a quite small range, and the cooperation with work of a preceding-stage chip is better.