The present invention relates to the technical field of electronic products and more particularly relates to cash register equipment. The cash register equipment comprises a host unit and an auxiliaryunit that are detachably connected to each other. The host unit comprises a first body and a first display screen arranged on the first body. The auxiliary unit comprises a second body and a second display screen arranged on the second body. The first body comprises a first shell with a first containing chamber in which an automatic ejecting and locking device is connected. The host unit also comprises a thermal printer connected to the automatic ejecting and locking device. The automatic ejection locking device comprises a pressing switch which is exposed outside the first shell and is usedfor controlling the automatic ejecting and locking device to drive the thermal printer to be locked to or ejected from the first shell. According to the cash register equipment, due to the built-in thermal printer, the overall volume of the host unit is not increased, the occupation area of the host unit is small, the placement requirement of the host unit is reduced, thus the use of the cash register equipment is more convenient, and the cash register equipment has the advantages of small limitation and flexible use.