摘要Along with the development of biomedical eigineering,negative pressure aspirator is nnre and more widely applied in clinical treauent and patients rescuing.The study of negative pressure aspirator is an important goal pursued in emergency treatment,because it can boost aid success.Given this need,this device based on MXI8051 single-drip is developed.The device can use Pulse Width Modulation(PWM)signal to drive the motor of negative pressure pump and it can adjust the motors speed through the Proportional Integral Derivative(PID)algorithm to realize the setting negative pressure rapidly,accurately and stably.The control requirement is acco nplishedthmugh the man-machine interface.This device has the advantage of simple operation,low cast and good practicability.