With the rise of 4D printing technology in recent years, Kagome truss structure with excellent mechanical properties is gradually applied to high heat transfer equipment as a new type of disturbance unit. For the array jet structure in the flame cylinder, a teardrop-shaped Kagome truss structure was placed in its jet space and the numerical simulation method was verified through experiments; the influence of the structural parameters on the heat transfer characteristics of the target surface was investigated by numerical simulation calculation method; The correlation equations of the Nussle number and the pressure loss of the target surface were fitted based on the calculated data, and the optimal structure was calculated under the range of the structural parameters. The results show that the fitted second-order response surface model is accurate with the prediction error being less than 1.70%. The effects of truss structural parameters d and α are more significant for average Nussle number Nu_ave, while d, α, β² and α*β are more significant for pressure loss coefficient C_p. When the optimal structural parameters are d = 1.000 mm, α = 45.001°, β = 46.623°, the errors between the optimized results and the simulated results for Nu_ave, C_p and comprehensive impact fact F were 1.24%, 0.18% and 1.20%, respectively. C_p is 0.93% less, Nu is 12.78% more, and F is 13.13% more in the optimized part compared to the test part.