The invention discloses a manufacturing method of colorful ceramic mobile phone shells. According to the manufacturing method, infiltration-resintering is adopted, and the colorful ceramic mobile phone shells are prepared via infiltration of porous ceramic biscuit in a colouring agent and a yttria-stabilized zirconium salt. The manufacturing method is capable of a technical problem in the prior art that mechanical properties are influenced severely by direct adding of the colouring agent into ceramic. According to the manufacturing method, negative pressure infiltration and pressure infiltration are combined; negative pressure infiltration is beneficial for discharge of gas, and microscopic defects caused by bubble packaging are avoided; pressure infiltration is capable of increasing filling rate of the yttria-stabilized zirconium salt in ceramic biscuit, and increasing ceramic density; the color of the mobile phone shells prepared via the manufacturing method is bright and various, mobile phone comprehensive mechanical properties are improved, and the diversified market requirements are satisfied.