The dynamic micro-deformation of the specimen under laser point source is numerically simulated by MSC.Marc software and measured using laser beam reflex amplifier system. Experimental result and simulation result show that the common action of thermal stress and phase transformation stress makes the specimen deformation. The final deformation direction of the specimen depends on the result of the co-operation of the thermal strain and the phase transformation strain, backwards or towards the laser beam. Compared the experimental with the simulation result, the largest deformation is almost the same and the deformation process is a little different. Considering that there is a kind of un-convention temperature distribution in the limit thickness specimen under laser irradiation, the temperature of inner material is higher than that of the boundary. Wave theory is suggested to modify classical heat transfer model so that simulation precision is improved. The conclusion lays the foundation for further research on mechanism and the process of laser bending.