This cart is to predict the price trend of bitcoin on the next halve time based on history bitcoin halve time and corresponding price trend，bitcoin halve can reflect bitcoin price，but it can’t indicate which time can pump, and which time may dump. From the previous two periods, the price trend is not completely the same before and after the time bitcoin halved. Thought, bitcoin halve indeed can bring some promotions about bitcoin, and represent the adding of mining difficulty. The increases in mining cost will also lead to an increase in bitcoin price, In a short time, the price after halved much higher the price before halving