Abstract: In order to obtain a better decision method of laser cladding sequence selection in laser cladding remanufacturing process, finite element method was used to analyze transient solution of temperature field of multichannel laser cladding heat transfer model of flat substrate. The reliability of whole numerical simulation process was verified by temperature measurement system based on thermocouple. An evaluation selection method was proposed. Numerical simulation was used to analyze and evaluate the transient temperature field of the matrix, and select laser scanning sequence during the cladding process according to evaluation criteria. It was the trajectory optimization method. The results show that experimental hardness data are 625.38HV, 620.58HV, 623.34HV, 680.09HV, 673.58HV and 683.01HV of one way successive method and evaluation selection method respectively. The average deformation values are 0.9722mm and 0.6458mm respectively. Evaluation selection method has the most uniform temperature field and the maximum temperature gradient around the pool, which can produce larger cladding layer hardness, smaller microstructure scale and smaller measurement deformation. This method provides an important reference value for sequential selection of laser cladding.