The invention relates to a pressing device which comprises a fixing assembly. A telescoping mechanism is connected to the lower end of the fixing assembly. A drive device capable of driving the telescoping mechanism to be stretched out or contracted is installed on the telescoping mechanism. An idler wheel assembly is installed at the bottom of the telescoping mechanism. The telescoping mechanism stretches out or contracts to drive the idler wheel assembly to press products. The fixing assembly is fixed to equipment or a fixing plate, the whole pressing device can be fixed conveniently, a rotary knob of the drive device rotates to drive left and right rotating lead screws to rotate to drive left and right rotating nuts to move, an upper connecting rod and a lower connecting rod are driven to be stretched out or contracted, finally, idler wheels are driven to press the products, and the idler wheels and the pressing degree of the products can be adjusted according to the size of the different products.