Abstract: The present invention is a continuous type of fluid mixing and feeding device; particularly, a batch fluid mixing and feeding device and an automatic and continuously conveying device are combined in order to mix and feed two or more than two kinds of fluids at a given temperature and a given viscosity, under controlled pressure. The mixing and feeding device comprises a first mixing means with rotary means, a pressure-varying mixer, and a multi-stage mixing means in a given number and being arranged in a suitable sequence. In this device, the fluid is processed through forward and reverse rotation, pressure-varying, and pushing repeatedly; fluids having different viscosity and particle size will thoroughly be pressed, cut, diverged, and mixed repeatedly during the feeding steps; then, a mixed fluid output at a constant temperature and constant pressure will be obtained continuously.