The invention relates to a flame temperature pan-scale light field detection method based on a micro-lens array and pulse laser, relates to the high temperature heat radiation measurement technology field and aims to adapt to demands on pan-scale analysis of flame light field detection. The flame temperature pan-scale light field detection method based on the micro-lens array and the pulse laser, a light field camera having the micro-lens array is utilized to acquire radiation intensity information of the high temperature flame in different directions, the pulse laser is radiated on the flame, spectrum radiation characteristic parameters of a medium can be solved through reverse problem solution according to the emission spectrum radiation intensity on the medium boundary received by a detector, in combination with the self emission radiation intensity of the flame, a three-dimensional temperature field of the high temperature flame can be reconstructed. According to the method, through simulation and calculation, the radiation characteristic parameters and the temperature field of the high temperature flame are reconstructed, and theoretical bases are further provided for calibration and measurement on the light field camera.