The welding residual stress and strain of cellular ice-maker plate are considered during 304 stainless steel laser welding process. The different welding powers lead to different sizes of laser welding seam. The influence of different welding seam sizes on the maximum bearing load and deformation of cellular ice-plate is studied in laser welding with a new analysis method. And some deformation controlling methods and a new welding procedure for cellular ice-maker plate are proposed. It is showed when the welding power is 1.4 kW and 1.8 kW，the ratio of longitudinal bending deflection is about 1.000∶1.328，which is equal to the ratio of longitudinal shrinkage stress respectively，and then the measured value of residual stress ratio is about 1.000∶1.391，which is similar to the calculated value. The research shows that the maximum bearing load has a certain relationship with the welding seam geometry，and the new function equation between the maximum bearing load and welding seam geometry is submit during 304 stainless steel laser welding process. The cycle welding sequence of inside and outside is proposed，which not only can reduce the occurrence of the welding deformation，but also do not affect the welding efficiency，so the quality of the cellular ice-maker plate is increased greatly.