The main technological measures for reducing two stroke motorcycle exhaust emission in China and foreign country are introduced. The characteristics of the measures in structure, effect, cost, etc., are analysed. The results show that the enleanment of conventional carburetor mixture and the improvement of the carburetor intake passage shape is a simple and effective measure, the adoption of the electronically controlled in cylinder direct fuel injection technique is a unique measure to completely improve emissions from two stroke motorcycles. The structure and cost of a stratified scavenging system is lower than that of in cylinder direct fuel injection, but its effect is better than that of the enleanment of carburetor mixture, so, it is worth investigating further. The factories of two stroke motorcycles may select the reduction measures of the exhaust emission by referring to the analyses and comparisons.