The invention discloses a manufacturing method of water-proof and oil-proof coloured polyester staple fibers, aiming at solving the problems of nonwoven fabric deformation and coloured polyester staple fiber discoloration of the traditional coloured nonwoven fabric in the process of obtaining water-proof and oil-proof properties through padding finishing. In the invention, water-proof agents and oil-proof agents are attached to the surfaces of the coloured polyester staple fibers step by step and layer by layer so as to enable to the surfaces of the coloured polyester staple fibers to achievethe water-proof and oil-proof properties; a nonwoven fabric per se, produced by using the coloured polyester staple fibers, has water-proof and oil-proof functions, without being subjected to paddingfinishing to obtain the water-proof and oil-proof functions, and has the characteristics of difficulty in deformation and difficulty in discoloration of the coloured polyester staple fibers when dried; and in addition, the process flow is simplified, the energy consumption is lowered and the production cost is reduced.