Rare earth stabilizer is a multi-component compound, which is divided into low toxicity and non-toxic. The other is the rare earth compounds containing calcium, zinc or organotin, which are completely lead-free green stabilizers. At present, the enterprise is organizing the research and development of rare earth multifunctional stabilizer for low lead plastic doors and windows. It is an urgent task to solve the problem that the material color is dark in 10 minutes after high temperature muffler factory, and the surface color of sample is not ideal when irradiated by xenon lamp for 3 hours. Technical parameters: the performance of the product is mainly reflected in that the fillet strength of the main profile of the frame with a meter weight of more than 1.0kg reaches more than 5000n, and the physical and mechanical performance indexes of the main profile reach or exceed GB / 8814-98. Our sewage treatment plant is in the leading position in China in terms of the advantages of unpowered devices, structural innovation of power sewage treatment plants, treatment and innovation of nitrification and denitrification process.