PP hollow plastic building formwork has high strength, impact resistance, wear resistance, long service life, turnover times can reach more than 100 times, good machinability, and can be used with wood formwork at the same time, the formwork light weight, easy to disassemble, safe and reliable. The waste boards and leftover materials can be recycled after building formwork, that is to save cost and reduce pollution. The comprehensive use cost can save more than 30% than that of traditional wood formwork.