A sunshade includes a support frame and a canopy connected to the support frame and including a light-transmissible fabric sheet of undyed yarns that has opposite inner and outer surfaces, an ink layer formed on one of the inner and outer surfaces of the light-transmissible fabric sheet using dye-sublimation printing techniques, and an opaque enamel coating coated on the other of the inner and outer surfaces of the light-transmissible fabric sheet The undyed yarns are woven and cross one another to form fabric pores thereamong. The opaque enamel coating fills the fabric pores. A method of preparing a canopy is disclosed.