To investigate the influence of piccolo tube parameters on temperature distribution on a concave surface, a numerical simulation is performed considering the external and internal flows. The effects of jethole diameter, jettojet spacing,circumferential orifice location, jethole arrangement, and piccolo tube position on the concave surface temperature distribution are analyzed. Results show that the jethole diameter has the greatest influence on the temperature distribution in the vicinity of concave leading edge among the presented research parameters. The relative difference of hot jet heating efficiency among differentjethole diameters reaches about 7%. There is an optimal value of jettojet spacing at which the concave surface temperature distribution is more reasonable. The influence of jettojet spacing on the hot jet heating efficiency is about 4%. When the piccolo circumferential holes are located at ±35°, the hot jet heating efficiency in the vicinity of concave leading edge is relative higher. Also, when the piccolo tube is located close to the concave leading edge, the hot jet heating efficiency could be improved. However, the influence of either piccolo circumferential orifice location or the piccolo tube location on the hot jet heating efficiency is limited within 2%.