Deliberately colluding with each other to conduct futures trading at the time, price and method agreed in advance, which affects the futures trading price or futures trading volume, can be considered as illegal behavior. Laws and regulations and self-discipline rules of futures exchanges prohibit backknocking. Article 29 of the Measures for Handling Violations of Shanghai Futures Exchange stipulates that it is not allowed to influence market prices, transfer funds or seek illegitimate interests by means of counter-drawing. Among them, if the price is seriously affected, it can be considered as a violation of the provisions of the Regulations on the Administration of Futures Trading prohibiting the manipulation of futures trading prices, and if the illegal profits are serious, it may violate the crime of manipulating futures market and theft in the criminal law.