In this paper, the surface of stainless steel is treated with a fiber laser to prepare a circular array structure to enhance the bonding strength between stainless steel and plastic. The stainless steel is connected to the plastic under heat and pressure. In order to obtain the expected bonding strength of stainless steel and plastic, the effects of the circular array structure′s parameters and bonding parameters on bonding strength are investigated. The results show that when the heating temperature is 400 ℃, the shear force of stainless steel and plastic bond is the strongest. When the pressure is 75 kN, the shear force of stainless steel and plastic bond is at its strongest. The height, quantity and coverage of burrs on the metal surface after laser treatment have an important effect on the bonding strength between stainless steel and plastics. When the proportion of burr number Tm value is less than 14.82%, the stainless steel and plastic fractured at the bond′s surface and the shear force increases with the increase of Tm. When the Tm value is greater than 14.82%, the stainless steel and plastic fractured at the plastic, and the strength of the shear force fluctuates around the average tensile fracture force of 950 N. The coverage of the laser processing area has an impact on the connection strength, 38.5% is the minimum coverage of stainless steel and plastics when they fracture at the plastic, which then has shear force of 900 N.