The invention provides a quartz sand powder composite board pressing machine. A plurality of vibration motors are fixed to a pressing head and arranged into groups by columns. Two columns of vibration motors are arranged to be one group, and motor rotating shafts of all the vibration motors in each column are sequentially connected in series and fixed. Each motor rotating shaft is provided with a synchronous gear. The synchronous gears which are arranged in the same group and correspond to the motor rotating shafts are engaged with one another. According to the quartz sand powder composite board pressing machine, the effect that all the motor rotating shafts rotate synchronously during operation of the vibration motors on the pressing head of the pressing machine is ensured, and simultaneous rising and falling of eccentric blocks of the vibration motors in the same group can further be ensured, so that synchronous rising and falling of the eccentric blocks on the rotating shafts of all the vibration motors fixed to the pressing head are achieved, and synchronous vibration of the motors drives the pressing head to produce an efficient exciting force effect.