GRENN's jet mixing device is a kind of equipment used in oil drilling solid control system, special solid control equipment used to configure and aggravate drilling fluid, jet mixing device is mainly used to change drilling fluid density, viscosity, water loss, etc. The effect is more prominent when used with shear pump. The jet mixing device is composed of a sand pump and a jet mixing funnel connected with a pipe sink valve and installed on a base, with safe and reliable performance and convenient transportation.