The invention relates to equipment for preparing a molecular sieve. The equipment comprises a tubular reactor, a gas-solid separator, an absorption tower and a raw material mixing unit. The tubular reactor comprises at least a material inlet, a material outlet and a tube body, wherein one of the material inlets and the material outlet are respectively positioned on both end parts of the tube body. The tubular reactor is communicated with the raw material mixing unit through a material inlet, and is communicated with the gas-solid separator through the material outlet. The upper part of the gas-solid separator is communicated with the absorption tower. The connection position of the gas-solid separator and the material outlet is lower than the connection position of the gas-solid separatorand the absorption tower. With the equipment, the contact reaction of the molecular sieve and SiCl4 can be continuously performed; with controlling the flow rate of the carrier gas and the length of the tubular reactor, the contacting time of the molecular sieve and the SiCl4 can be controlled, such that the complete reaction performing can be ensured.