The invention relates to the technical field of glass fiber processing, and discloses a glass fiber melting and infiltrating device, which comprises an infiltration box, a box plate is mounted at thetop end of the infiltration box, L-shaped frames are mounted on the two sides of the upper end of the box plate, telescopic columns are slidably arranged in the middles of the upper ends of the L-shaped frames, conveying frames are connected to the upper ends of the telescopic columns, conveying wheels are rotatably arranged in the middles of the upper ends of the conveying frames, the outer sleeve of the telescopic column between the conveying frame and the L-frame is provided with a telescopic spring, the two sides of the interior of the infiltration box are provided with traction wheels correspondingly, glass fibers are wound between the traction wheels, a disturbance box is installed in the middle of the lower end of the box plate, the interior of the disturbance box makes contact witha rotating block and the disturbance block through an oblique section, the rotating block is located on the upper side of the disturbance block, and a guide groove is formed in the middle of the right side of the disturbance block and internally provided with a guide block. According to the device, glass fibers and a soaking agent can be in full contact for soaking, and the soaking effect of theglass fibers is further improved under the cooperation of the lifting gear and the lifting rack.