Abstract: This article introduces an injection water flow monitoring and control device once applied in Yaoqiao Coal Mine of Datun Coal Power Company.The device,based upon the control of single chip microcomputer,monitors multicoal seam injecton hole with efficient control simultaneously.By this the control of coal seam injection hole with efficient control simultaneously.By this the control of coal seam injection effect is achieved and improved,hence the management of coal seam injection is greatly convenienced.