The invention discloses an injection molding die with cavity and ventilation regulators. The injection molding die comprises a fixed die and a moving die, wherein the fixed die and the moving die areclosed, forming a cavity, and are fixedly connected through a bolt; the fixed die is provided with a cavity regulating device along inner cavities at the front and rear ends; the fixed die is providedwith a ventilation groove regulating device along the two sides; an inner cavity of the moving die is provided with a pressure control device, and the pressure control device consists of a threaded opening, a screw, a rotating disc and a pressure regulating plate; the cavity regulating device consists of rectangular hollow grooves, support plates, return springs 1, support seats, vertical long grooves, L-shaped return rods, rectangular long grooves, locating grooves and locating rods; and the ventilation groove regulating device consists of rectangular ventilation grooves, rectangular concavegrooves, baffles, return springs 2, locking screws and threaded layers. The injection molding die has the beneficial effects of simple structure and high practicability.