The invention discloses a titanium and titanium alloy surface chemical blackening and direct electroplating method. The method includes the flowing steps that (1), base materials of titanium and titanium alloy are subjected to conventional pretreatment, and the conventional pretreatment includes the steps of chemical degreasing, electrolytic degreasing and acid activation; (2), chemical blackening and electroplating pretreatment are performed, specifically, the titanium and titanium alloy in step one are soaked in a mixed solution formed by mixing an agent A and an agent B in different proportions, the agent A is prepared from 20-30% of fluoride, 10-30% of a phosphate complexing agent, 5-10% of an antioxidant, 1-4% of a wetting agent and 27-44% of pure water, and the agent B is prepared from 60-80% of organic amine, 1-2% of zinc salt and 18-39% of pure water; (3), the titanium and titanium alloy in step two are subjected to direct electroplating treatment. According to the requirements of chemical blackening and direct electroplating, the proportion of the agent A to the agent B is adjusted, and the problem that it is difficult for the titanium and titanium alloy to be subjected to direct electroplating and chemical blackening delustering is solved.