The utility model discloses a turbocharger vent valve control device which solves the problem that an existing supercharger vent valve is fixed in opening or can not be adjusted continuously. The turbocharger vent valve control device comprises an air inlet flow control valve (2), a surge tank (3), an air outlet flow control valve (6), an equal-diameter tee pipe coupling (7), an outflow air pressure gauge (8) and a bypass valve (13), wherein the left end of the air inlet flow control valve (2) is in pipeline connection with a high-pressure air source, the right end of the air inlet flow control valve (2) is connected with the left end of the surge tank (3), the right end of the surge tank (3) is in pipeline connection with the left end of the air outlet flow control valve (6), an air supply pressure gauge (4) is connected on a pipeline between the surge tank (3) and the air outlet flow control valve (6), the right end of the air outlet flow control valve (6) is connected with the left end of the equal-diameter tee pipe coupling (7), the right end of the equal-diameter tee pipe coupling (7) is in pipeline connection with a turbocharger vent vale controller (15), and the lower end of the equal diameter tee pipe coupling (7) is in pipeline connection with the bypass valve (13).