The invention provides a laser surface modification method of a copper-chromium alloy contact, wherein the laser surface modification method comprises the following steps: step 100, a to-be-processed copper-chromium alloy contact is placed in an operating room with controllable oxygen content, and then the copper-chromium alloy contact is fixed by a temperature control fixture; step 200, according to the copper-chromium alloy contact modification requirements, the type of used laser is selected and processing parameters of the laser are adjusted; and step 300, the laser is controlled to gradually and comprehensively process the surface of the copper-chromium alloy contact along a set route, the copper-chromium alloy contact having the surface formed with a 10-300 [mu]m fine grain layer is obtained, and in the fine grain layer, the particle size of chromium particles is less than 1 [mu]m. The method has small thermal effect generated on a matrix; in addition to improving the yield strength, the tensile strength, the hardness and other mechanical properties, the more dense fine grain layer can be formed on the surface of the copper-chromium alloy contact, the roughness of the contact surface is greatly reduced, and the electrical properties of the copper-chromium alloy contact and the current breaking capacity are improved.